WO2017006902A1 - 半導体素子の製造方法 - Google Patents
半導体素子の製造方法 Download PDFInfo
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- WO2017006902A1 WO2017006902A1 PCT/JP2016/069764 JP2016069764W WO2017006902A1 WO 2017006902 A1 WO2017006902 A1 WO 2017006902A1 JP 2016069764 W JP2016069764 W JP 2016069764W WO 2017006902 A1 WO2017006902 A1 WO 2017006902A1
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- cleavage
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 311
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 220
- 238000003776 cleavage reaction Methods 0.000 claims description 392
- 230000007017 scission Effects 0.000 claims description 392
- 238000000034 method Methods 0.000 claims description 58
- 230000015572 biosynthetic process Effects 0.000 claims description 14
- 238000005530 etching Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 description 45
- 230000006698 induction Effects 0.000 description 12
- 229910004298 SiO 2 Inorganic materials 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 238000013459 approach Methods 0.000 description 7
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000002955 isolation Methods 0.000 description 5
- 238000000206 photolithography Methods 0.000 description 5
- 238000001039 wet etching Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/005—Processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/0005—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by breaking, e.g. dicing
- B28D5/0011—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by breaking, e.g. dicing with preliminary treatment, e.g. weakening by scoring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/544—Marks applied to semiconductor devices or parts, e.g. registration marks, alignment structures, wafer maps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/005—Processes
- H01L33/0095—Post-treatment of devices, e.g. annealing, recrystallisation or short-circuit elimination
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/562—Protection against mechanical damage
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0008—Processes
- H01L2933/0033—Processes relating to semiconductor body packages
Definitions
- the present invention relates to a method for manufacturing a semiconductor element.
- a semiconductor element manufacturing method including a third step of cleaving a wafer is known (see Patent Document 1).
- the method for manufacturing a semiconductor device has a problem that the manufacturing yield of the semiconductor device is reduced because the wafer is divided at a position greatly deviated from the division reference line where the cleavage grooves are arranged.
- a plurality of semiconductor elements and cleavage grooves may be formed to be inclined in the direction of the azimuth angle in the main surface of the wafer with respect to the cleavage line of the wafer.
- the plurality of semiconductor elements are divided along the cleavage line of the wafer without the dividing lines of the semiconductor elements being guided by the cleavage grooves. Is done. For this reason, the wafer is divided at a position greatly deviated from the dividing reference line where the cleavage grooves are arranged, and the manufacturing yield of the semiconductor element is lowered.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a method of manufacturing a semiconductor device that can improve the manufacturing yield of the semiconductor device.
- a plurality of semiconductor elements arranged along a first direction and a second direction intersecting the first direction are formed on a main surface of a wafer, Forming a plurality of cleaved groove groups between the semiconductor elements, and cleaving the wafer along the division reference line to separate the plurality of semiconductor elements from each other.
- the plurality of cleavage groove groups are arranged on the division reference line.
- at least one of the plurality of cleavage groove groups is arranged for four semiconductor elements adjacent to each other in the first direction and the second direction.
- Each of the plurality of cleavage grooves includes a plurality of cleavage grooves arranged on the division reference line.
- the plurality of cleavage grooves included in each of the plurality of cleavage groove groups formed between the plurality of semiconductor elements are such that the dividing line is sufficiently close to the dividing reference line.
- the dividing line can be corrected.
- the plurality of cleavage groove groups including the plurality of cleavage grooves can prevent the wafer from being divided at a position greatly deviated from the division reference line.
- the manufacturing method of the semiconductor device of this embodiment can improve the manufacturing yield of the semiconductor device.
- FIG. 3 is a schematic partially enlarged plan view of a region III shown in FIG. 2 in one step of the method for manufacturing a semiconductor element according to the first embodiment of the present invention.
- FIG. 4 is a schematic partially enlarged cross-sectional view taken along a cross-sectional line IV-IV shown in FIG. It is a general
- FIG. 37 is a schematic partial enlarged plan view of a region XXXVII shown in FIG. 36 in one step of the method of manufacturing a semiconductor device according to the fifteenth embodiment of the present invention.
- Embodiment 1 A method for manufacturing the semiconductor element 12 according to the first embodiment will be described with reference to FIGS.
- the method of manufacturing the semiconductor element 12 according to the present embodiment includes a first direction and a first direction on a first region of the main surface 11m (see FIG. 7) of the wafer 11.
- the material of the wafer 11 is not particularly limited, but may be indium phosphide (InP), for example.
- the second direction may be orthogonal to the first direction.
- the first direction may be parallel to the division reference line 14.
- the plurality of semiconductor elements 12 are formed to be inclined with respect to the cleavage line 15 of the wafer 11 in the direction of the azimuth angle in the main surface 11m of the wafer 11 (see FIG. 7).
- the cleavage line 15 means an intersection line between the cleavage surface 11 s (see FIG. 7) of the wafer 11 and the main surface 11 m of the wafer 11.
- the cleavage plane 11s of the wafer 11 means a crystal plane of the wafer 11 having cleavage properties.
- the division reference line 14 means a reference line for dividing the wafer 11.
- the plurality of semiconductor elements 12 include, for example, a semiconductor layer, an insulating layer, and an electrode.
- a semiconductor layer, an insulating layer, and an electrode are deposited on the main surface 11 m of the wafer 11 by using a sputtering method, a vacuum evaporation method, a chemical vapor deposition (CVD) method, or the like, thereby forming a plurality of semiconductor elements 12.
- the semiconductor element 12 is a light emitting diode or a semiconductor laser, and includes an active region 13. Light is emitted from each active region 13 of the plurality of semiconductor elements 12 obtained by dividing the plurality of semiconductor elements 12.
- the extending direction of the active region 13 is inclined with respect to the cleavage line 15 in the direction of the azimuth angle in the main surface 11m of the wafer 11 (see FIG. 7).
- the semiconductor element 12 is not limited to a light emitting diode or a semiconductor laser, and may be, for example, a transistor having a vertical structure or a horizontal structure.
- the method for manufacturing semiconductor element 12 includes a plurality of cleavage groove groups between a plurality of semiconductor elements 12 in the first region of main surface 11 m of wafer 11. 20 (S12), and cleaving start point 18 is formed in the second region of main surface 11m (see FIG. 7) of wafer 11 different from the first region (S13).
- the plurality of cleavage groove groups 20 and the cleavage starting point 18 are arranged on the division reference line 14.
- at least one of the plurality of cleavage groove groups 20 is arranged for four semiconductor elements 12 adjacent to each other in the first direction and the second direction.
- Each of the plurality of cleavage groove groups 20 includes a plurality of cleavage grooves 21, 22, and 23 disposed on the division reference line 14.
- a plurality of cleaved groove groups 20 are arranged with respect to one division reference line 14.
- the division reference line 14 is located between two semiconductor elements 12 adjacent to each other in the second direction.
- two cleavage groove groups 20 adjacent to each other in the first direction among the plurality of cleavage groove groups 20 are arranged symmetrically with respect to the active region 13.
- the first distance d 1 between the cleavage groove group 20 located on the cleavage start point 18 side with respect to the active region 13 and the active region 13 is the cleavage start point 18 side with respect to the active region 13.
- the first distance d 1 is defined as the distance between the cleavage groove group 20 located on the cleavage start point 18 side with respect to the active region 13 and the center line of the active region 13.
- the second distance d 2 is defined as a distance between the cleavage groove group 20 located on the side opposite to the cleavage starting point 18 side with respect to the active region 13 and the center line of the active region 13.
- the plurality of cleavage groove groups 20 are formed so as not to contact the active region 13.
- the plurality of cleavage grooves 21, 22, and 23 are formed to be inclined with respect to the cleavage line 15 in the azimuth direction within the main surface 11 m of the wafer 11.
- the direction in which the plurality of cleavage grooves 21, 22 and 23 are arranged is orthogonal to the direction in which the active region 13 extends.
- the formation of the plurality of cleavage groove groups 20 (S12) and the formation of the cleavage starting point 18 (S13) may be performed first, or both may be performed simultaneously.
- the formation of the plurality of cleavage groove groups 20 (S12) and the formation of the cleavage starting point 18 (S13) include element isolation grooves (not shown) of the semiconductor element 12 arranged along the element isolation lines 16s. ) May be performed at the same time. Thereby, the manufacturing time of the semiconductor element 12 can be shortened.
- the element isolation line 16s is located between two semiconductor elements 12 adjacent to each other in the first direction.
- Forming the plurality of cleavage groove groups 20 may include etching the wafer 11.
- Forming the cleavage start point 18 may include forming a cleavage start groove (18).
- the cleavage starting point 18 may be a cleavage starting groove (18).
- forming the cleavage starting point portion 18 may include etching the wafer 11.
- the plurality of cleavage groove groups 20 and cleavage starting point grooves (18) may be formed in a common process.
- the formation of the plurality of cleavage groove groups 20 and the cleavage start point groove (18) in a common process means that the cleavage start point groove (18) is also formed in the process of forming the plurality of cleavage groove groups 20. .
- the plurality of cleavage grooves 21, 22, and 23 included in each of the plurality of cleavage groove groups 20 have a depth of 10 ⁇ m, for example.
- the plurality of cleavage groove groups 20 and cleavage starting point grooves (18) may be formed by etching the wafer 11 using a mask having an opening formed by a photolithography process.
- a silicon dioxide (SiO 2 ) film is formed on the main surface 11 m of the wafer 11 on which the plurality of semiconductor elements 12 are formed by sputtering or plasma CVD.
- a resist is formed on the SiO 2 film.
- An opening is formed in the resist using a photolithography process.
- the SiO 2 film is dry-etched to form the opening in the SiO 2 film.
- a gas composed of a compound containing an element such as carbon, hydrogen, or fluorine may be used as an etching gas.
- the wafer 11 is etched using the SiO 2 film in which the opening is formed as a mask.
- the etching of the wafer 11 may be dry etching such as inductively coupled plasma reactive ion etching (ICP-RIE), or may be wet etching using a hydrochloric acid-based etchant.
- ICP-RIE inductively coupled plasma reactive ion etching
- the plurality of cleavage groove groups 20 and cleavage starting point grooves (18) may be formed in the wafer 11 by a common etching process.
- the formation of the plurality of cleavage groove groups 20 includes the plurality of cleavage grooves 21 having the same bottom area when the main surface 11m of the wafer 11 is viewed in plan. , 22, 23 may be included.
- the plurality of cleavage grooves 21, 22, and 23 have the same bottom surface area. Therefore, when the wafer 11 is etched to form the plurality of cleavage grooves 21, 22, and 23.
- the area of the opening of the mask used in the above is the same.
- the plurality of cleavage grooves 21, 22, and 23 included in the cleavage groove group 20 are formed simultaneously, the plurality of cleavage grooves 21, 22, and 23 can be suppressed from having different depths.
- the accuracy of the correction of the dividing line 16 toward the dividing reference line 14 by the plurality of cleavage grooves 21, 22, 23 is further improved and greatly improved from the dividing reference line 14. It can be further suppressed that the wafer 11 is cleaved.
- cleavage grooves having different depths are formed. If the depth of the cleavage groove is relatively deep, the wafer 11 is easily broken in the relatively deep cleavage groove. If the depth of the cleavage groove is relatively shallow, it becomes difficult for the relatively shallow cleavage groove to correct the dividing line 16.
- the dividing line 16 means an intersection line between the dividing surface and the main surface 11m of the wafer 11.
- the dividing surface means a surface on which the wafer 11 is actually divided when the wafer 11 is cleaved.
- each of the plurality of cleavage groove groups 20 includes three cleavage grooves 21, 22, and 23.
- Each of the plurality of cleavage groove groups 20 may include two cleavage grooves or four or more cleavage grooves.
- the cleavage groove 22 is disposed on the opposite side (end point F side) from the cleavage start point 18 side with respect to the cleavage groove 21 with an interval 20G.
- the cleavage groove 23 is disposed on the opposite side (end point F side) from the cleavage start point 18 side with respect to the cleavage groove 22 with a gap 20G.
- the interval between the cleavage groove 21 and the cleavage groove 22 may be equal to or different from the interval between the cleavage groove 22 and the cleavage groove 23.
- the distance 20G between the plurality of adjacent cleaved grooves 21, 22, 23 increases, the number of cleaved grooves 21, 22, 23 decreases. Therefore, for example, when the wafer 11 is made of an InP material, the interval 20G between the plurality of adjacent cleaved grooves 21, 22, 23 is preferably 100 ⁇ m or less.
- each of the three cleavage grooves 21, 22, and 23 may have an elongated shape in a direction along the division reference line 14.
- the cleavage groove 21 has a groove length 21 ⁇ / b> L in a direction along the division reference line 14 and a groove width 21 ⁇ / b> W in a direction orthogonal to the division reference line 14.
- the cleavage groove 22 has a groove length 22 ⁇ / b> L in a direction along the division reference line 14 and a groove width 22 ⁇ / b> W in a direction orthogonal to the division reference line 14.
- the cleavage groove 23 has a groove length 23 ⁇ / b> L in a direction along the division reference line 14 and a groove width 23 ⁇ / b> W in a direction orthogonal to the division reference line 14.
- the center of the groove width 21W of the cleavage groove 21, the center of the groove width 22W of the cleavage groove 22, and the center of the groove width 23W of the cleavage groove 23 may be located on the division reference line 14.
- the cleavage groove 21, the cleavage groove 22, and the cleavage groove 23 may have the same shape as each other or different shapes from each other.
- the groove length 21L, the groove length 22L, and the groove length 23L may be equal to each other or different from each other.
- the groove width 21W, the groove width 22W, and the groove width 23W may be equal to each other or different from each other.
- the plurality of cleaved grooves 21, 22, and 23 each have a groove length (21L, 22L, and 23L) of 5 ⁇ m to 100 ⁇ m, preferably 10 ⁇ m to 50 ⁇ m. May be.
- the groove length (21L, 22L, 23L) of the plurality of cleavage grooves 21, 22, 23 is reduced, the depth of the cleavage grooves 21, 22, 23 is reduced.
- the groove length (21L, 22L, 23L) and depth of the cleavage grooves 21, 22, and 23 are reduced, it becomes difficult to bring the dividing line 16 closer to the dividing reference line 14 by the plurality of cleavage grooves 21, 22, and 23. .
- each of the plurality of cleaved grooves 21, 22, and 23 has a groove length (21L, 22L, 23L) of 5 ⁇ m or more.
- the groove length (21L, 22L, 23L) of the plurality of cleavage grooves 21, 22, 23 increases, the number of the plurality of cleavage grooves 21, 22, 23 decreases.
- the plurality of cleaved grooves 21, 22, 23 each have a groove length (21L, 22L, 23L) of 100 ⁇ m or less.
- each of the plurality of cleaved grooves 21, 22, 23 has a groove width (21 W, 22 W, 23 W) of 1 ⁇ m to 20 ⁇ m, preferably 5 ⁇ m to 15 ⁇ m. May be.
- the groove width (21W, 22W, 23W) of the plurality of cleavage grooves 21, 22, 23 is reduced, the depth of the cleavage grooves 21, 22, 23 is reduced.
- the groove width (21W, 22W, 23W) and depth of the cleavage grooves 21, 22, and 23 are reduced, it becomes difficult to bring the dividing line 16 closer to the dividing reference line 14 by the plurality of cleavage grooves 21, 22, and 23. .
- each of the plurality of cleaved grooves 21, 22, and 23 has a groove width (21W, 22W, 23W) of 1 ⁇ m or more.
- the groove widths (21W, 22W, 23W) of the plurality of cleavage grooves 21, 22, 23 are increased, the end portions of the groove widths (21W, 22W, 23W) of the plurality of cleavage grooves 21, 22, 23 are divided reference line 14 It is difficult to bring the dividing line 16 close to the dividing reference line 14 by the plurality of cleaved grooves 21, 22, 23 away from the center. Therefore, it is preferable that the plurality of cleaved grooves 21, 22, 23 each have a groove width (21 W, 22 W, 23 W) of 20 ⁇ m or less.
- the plurality of cleavage grooves 21, 22, and 23 may have a V shape in a cross section orthogonal to the division reference line 14 as shown in FIGS. 4 and 5. As shown in FIGS. 4 and 5, the bottom surfaces of the plurality of cleavage grooves 21, 22, and 23 may have a V shape in a cross section perpendicular to the division reference line 14.
- the plurality of cleavage grooves 21, 22, and 23 having a V shape can be formed by, for example, wet etching the wafer 11. As shown in FIG. 6, the plurality of cleavage grooves 21, 22, and 23 may have a rectangular shape in a cross section orthogonal to the division reference line 14. As shown in FIG. 6, the bottom surfaces of the plurality of cleavage grooves 21, 22 and 23 may be flat in a cross section perpendicular to the division reference line 14.
- the V-shaped grooves of the plurality of cleavage grooves 21, 22, 23 are formed. Stress concentrates on the tip. Therefore, the wafer 11 is easily cleaved at the center of the groove widths (21W, 22W, 23W) of the plurality of cleaved grooves 21, 22, 23 having a V shape.
- the plurality of cleavage grooves 21, 22, and 23 having a V-shape can bring the dividing line 16 closer to the dividing reference line 14 with higher accuracy.
- the method for manufacturing the semiconductor element 12 according to the present embodiment may further include grinding the wafer 11.
- the method for manufacturing the semiconductor element 12 according to the present embodiment may further include forming a back electrode on the back surface of the wafer 11 opposite to the main surface 11 m of the wafer 11.
- the method for manufacturing semiconductor element 12 includes cleaving wafer 11 and separating a plurality of semiconductor elements 12 from each other (S 14). Specifically, the blade 19 is pressed from the back side of the wafer 11 to apply a load to the wafer 11. The wafer 11 is cleaved along the cleavage line 15 from the cleavage starting point 18. For example, when the wafer 11 has a (100) principal surface 11m, the cleavage plane 11s is the (0-1-1) plane, and the wafer 11 is separated from the cleavage starting point 18 in the [01-1] direction or [ Cleaved in the direction of [0-11]. As shown in FIGS.
- the wafer 11 is cleaved along the division reference line 14 from the starting point S indicated by a black circle toward the end point F indicated by a white circle.
- the starting point S and the ending point F are located on the division reference line 14.
- the wafer 11 is cleaved from the cleavage starting point 18 in a direction along the main surface 11 m of the wafer 11 and a thickness direction of the wafer 11 orthogonal to the main surface 11 m of the wafer 11.
- the plurality of semiconductor elements 12 and the plurality of cleavage grooves 21, 22, 23 are within the main surface 11 m of the wafer 11 with respect to the cleavage line 15 of the wafer 11. It is tilted in the direction of the azimuth angle.
- the divided reference line 14 that is the arrangement direction of the plurality of cleavage grooves 21, 22, and 23 is shifted from the cleavage line 15 by the azimuth angle ⁇ .
- the cleavage line 15 is parallel to the grooveless dividing line 17 described later.
- the wafer 11 is divided from the cleavage starting point 18 along a cleavage line 15 that is inclined by an azimuth angle ⁇ with respect to the division reference line 14.
- the inclination of the division reference line 14 with respect to the cleavage line 15 in the direction of the azimuth angle in the main surface 11m of the wafer 11 is, for example, the angle deviation of the orientation flat of the wafer 11 and the pattern deviation of the plurality of semiconductor elements 12 in the photolithography process.
- a plurality of cleavage groove groups 20 are formed between the plurality of semiconductor elements 12.
- Each of the plurality of cleavage groove groups 20 includes a plurality of cleavage grooves 21, 22, and 23 disposed on the division reference line 14. While the wafer 11 does not exist in the plurality of cleavage grooves 21, 22, and 23, the wafer 11 exists around the plurality of cleavage grooves 21, 22, and 23. Therefore, stress is generated at each edge portion of the plurality of cleavage grooves 21, 22, 23, that is, a portion of the wafer 11 facing each of the plurality of cleavage grooves 21, 22, 23.
- a step 25 is formed on the dividing line 16 and the dividing surface.
- the step 25 is formed from a plurality of cleavage grooves 21, 22, 23 from the cleavage start point 18 side toward the opposite side of the cleavage start point 18 (direction from the start point S toward the end point F), and the main surface of the wafer 11. It extends from 11 m toward the back surface of the wafer 11.
- the size of the step 25 corresponds to the correction amount of the dividing line 16 and the dividing surface in each of the plurality of cleavage grooves 21, 22, and 23.
- a position x on the horizontal axis in FIG. 10 represents a position in the wafer 11 in the direction along the division reference line 14.
- a position x on the side of the cleavage starting point 18 of the semiconductor element 12 closest to the cleavage starting point 18 is defined as 0 ⁇ m.
- the position x opposite to the cleavage starting point 18 side of the semiconductor element 12 farthest from the cleavage starting point 18 may be, for example, 14000 ⁇ m.
- the position y of the dividing line 16 on the vertical axis in FIG. 10 represents the magnitude of the deviation of the dividing line 16 from the dividing reference line 14 at the position x (the distance between the dividing reference line 14 and the dividing line 16).
- the split reference line 14 is inclined with respect to the cleavage line 15 only by the azimuth angle ⁇ . Therefore, in Comparative Example 1 in which the plurality of cleavage grooves 21, 22, and 23 are not formed, as shown by the grooveless dividing line 17 shown in FIG. 8, the dividing line 16 becomes the dividing reference line as the distance from the cleavage starting point 18 increases. Deviated greatly from 14. In Comparative Example 2, one cleavage groove is formed for four semiconductor elements 12 adjacent to each other in the first direction and the second direction. The cleavage groove of Comparative Example 2 cannot correct the dividing line 16 so that the dividing line 16 is sufficiently close to the dividing reference line 14.
- one cleaved groove group 20 is formed for four semiconductor elements 12 adjacent to each other in the first direction and the second direction.
- Each of the plurality of cleavage groove groups 20 includes three plurality of cleavage grooves 21, 22, and 23.
- the position y of the dividing line 16 in the semiconductor element 12 farthest from the cleavage starting point 18 is reduced to one third or less of the first comparative example.
- the dividing line 16 is sufficiently close to the dividing reference line 14 by the cleavage groove group 20 including the plurality of cleavage grooves 21, 22, 23 between the plurality of semiconductor elements 12. Can be corrected.
- each of the plurality of cleavage groove groups includes two cleavage grooves (for example, cleavage groove group 20j shown in FIGS. 36 and 37).
- the position y of the dividing line 16 in the semiconductor element 12 farthest from the cleavage starting point 18 is reduced to one third or less of the first comparative example.
- the dividing line 16 can be corrected so that the dividing line 16 is sufficiently close to the dividing reference line 14 by the cleavage groove group including two cleavage grooves between the plurality of semiconductor elements 12. .
- the cleavage of the wafer 11 and the separation of the plurality of semiconductor elements 12 from each other may include the separation of the plurality of semiconductor elements 12 from each other along the element separation line 16s where the element separation grooves are arranged. Good.
- the manufacturing method of the semiconductor element 12 of this Embodiment is demonstrated.
- a plurality of elements arranged in the first region of the main surface 11m of the wafer 11 along the first direction and the second direction intersecting the first direction.
- a plurality of cleavage groove groups 20 are formed between the plurality of semiconductor elements 12 in the first region of the main surface 11m of the wafer 11 (S12), Forming a cleavage starting point 18 in a second region of the main surface 11m of the wafer 11 different from the first region (S13).
- the method for manufacturing the semiconductor element 12 includes cleaving the wafer 11 along the division reference line 14 and separating the plurality of semiconductor elements 12 from each other (S14).
- the plurality of cleavage groove groups 20 and the cleavage starting point 18 are arranged on the division reference line 14.
- at least one of the plurality of cleavage groove groups 20 is arranged for four semiconductor elements 12 adjacent to each other in the first direction and the second direction.
- Each of the plurality of cleavage groove groups 20 includes a plurality of cleavage grooves 21, 22, and 23 disposed on the division reference line 14.
- the manufacturing method of the semiconductor element 12 of the present embodiment even if the division reference line 14 is inclined in the direction of the azimuth in the main surface 11m of the wafer 11 with respect to the cleavage line 15 of the wafer 11, a plurality of semiconductors
- the plurality of cleavage grooves 21, 22, and 23 included in each of the plurality of cleavage groove groups 20 formed between the elements 12 correct the division line 16 so that the division line 16 is sufficiently close to the division reference line 14. be able to.
- the plurality of cleavage groove groups 20 including the plurality of cleavage grooves 21, 22, and 23 can prevent the wafer 11 from being divided at positions greatly deviated from the division reference line 14.
- the manufacturing method of the semiconductor element 12 according to the present embodiment can improve the manufacturing yield of the semiconductor element 12.
- the plurality of cleavage grooves 21, 22, and 23 may have a V shape in a cross section orthogonal to the division reference line 14.
- stress concentrates on the tips of the V-shaped grooves of the plurality of cleaved grooves 21, 22, and 23.
- the wafer 11 is easily cleaved at the center of the groove width (21W, 22W, 23W) of the plurality of cleavage grooves 21, 22, 23 having a V-shape.
- the plurality of cleavage grooves 21, 22, and 23 having a V-shape can bring the dividing line 16 closer to the dividing reference line 14 with higher accuracy.
- forming the cleavage starting point 18 may include forming the cleavage starting groove (18) by etching the wafer 11. Forming the cleavage start groove (18) by etching suppresses the formation of cracks around the cleavage start groove (18). According to the manufacturing method of the semiconductor element 12 of the present embodiment, the wafer 11 is prevented from being cleaved at the position where the division reference line is greatly deviated from 14 due to the crack, and the wafer 11 is divided into the division reference line. 14 can be cleaved along.
- the plurality of cleavage groove groups 20 and the cleavage starting point groove (18) may be formed in a common process. According to the manufacturing method of the semiconductor element 12 of the present embodiment, the number of manufacturing steps of the semiconductor element 12 can be reduced, and the semiconductor element 12 can be manufactured efficiently.
- the formation of the plurality of cleavage groove groups 20 includes the plurality of cleavage grooves 21 having the same bottom area when the main surface 11m of the wafer 11 is viewed in plan. , 22, 23 may be included. Since the plurality of cleavage grooves 21, 22, and 23 have the same bottom surface area, the plurality of cleavage grooves 21, 22, and 23 can be prevented from having different depths. According to the manufacturing method of the semiconductor element 12 of the present embodiment, the accuracy of the correction of the dividing line 16 toward the dividing reference line 14 by the plurality of cleavage grooves 21, 22, 23 is further improved and greatly improved from the dividing reference line 14. It can be further suppressed that the wafer 11 is cleaved.
- FIG. A method for manufacturing the semiconductor element 12 according to the second embodiment will be described with reference to FIGS.
- the manufacturing method of the semiconductor element 12 according to the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 according to the first embodiment, and has the same effects, but mainly differs in the following points. .
- the plurality of semiconductor elements 12 include an active region 13.
- the plurality of cleavage groove groups 20 a are adjacent to the active region 13 and are adjacent to the active region 13 and are adjacent to the active region 13 and to the active region 13. It includes a second cleavage groove group 20a2 located on the opposite side to the cleavage starting point 18 side.
- the first cleavage groove group 20a1 and the second cleavage groove group 20a2 include a plurality of cleavage grooves 21, 22, and 23, respectively.
- the formation of the plurality of cleavage groove groups 20a means that the first distance d 1 between the first cleavage groove group 20a1 and the active region 13 is a second distance between the second cleavage groove group 20a2 and the active region 13. as is larger than the distance d 2, comprising forming a plurality of cleavage groove group 20a.
- the step 25 reduces the light emission efficiency of the semiconductor element 12.
- the first distance d 1 between the first cleavage groove group 20a1 and the active region 13 is the second distance d between the second cleavage groove group 20a2 and the active region 13. Greater than 2 . Therefore, the distance d 4 between the step 25 and the active region 13 in the manufacturing method of this embodiment (see FIG. 12), the distance d 3 (FIG between the step 25 and the active region 13 in the manufacturing method of the first embodiment 9).
- the semiconductor element 12 having improved luminous efficiency can be manufactured with improved manufacturing yield.
- Embodiment 3 With reference to FIG. 13, the manufacturing method of the semiconductor element 12 which concerns on Embodiment 3 is demonstrated.
- the manufacturing method of the semiconductor element 12 of the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 of the first embodiment, but mainly differs in the following points.
- the manufacturing method of the semiconductor element 12 of the present embodiment includes forming a plurality of cleavage groove groups 20b.
- Each of the plurality of cleavage groove groups 20b includes a plurality of cleavage grooves (21b, 22b, 23b).
- the first ends of the plurality of cleavage grooves (21b, 22b, 23b) on the opposite side (end point F side) from the cleavage start point 18 side are directed toward the opposite side (end point F side) from the cleavage start point 18 side. It has a tapered shape.
- the second ends of the plurality of cleavage grooves (21b, 22b, 23b) on the cleavage start point 18 side (start S side) are the cleavage start point 18 side (start S). You may have a shape which becomes tapered as it goes to the side.
- the plurality of cleavage grooves (21b, 22b, 23b) in the present embodiment may have a rectangular shape as shown in FIG.
- the plurality of cleavage grooves (21b, 22b, 23b) may have a V-shape in a cross section perpendicular to the division reference line 14, as shown in FIGS.
- the effect of the manufacturing method of the semiconductor element 12 of the present embodiment will be described.
- the effects of the manufacturing method of the semiconductor element 12 of the present embodiment mainly have the following effects in addition to the same effects as the manufacturing method of the semiconductor element 12 of the first embodiment.
- the first end portions of the plurality of cleavage grooves (21b, 22b, 23b) on the side opposite to the cleavage starting point portion 18 side (end point F side) are the cleavage starting point portion 18. It has a shape that tapers toward the side opposite to the side (end point F side). Stress is generated in each edge portion of the plurality of cleavage grooves (21b, 22b, 23b), that is, a portion of the wafer 11 facing each of the plurality of cleavage grooves (21b, 22b, 23b). This stress is concentrated on the tapered tip of the first end of the plurality of cleavage grooves (21b, 22b, 23b).
- the wafer 11 When the wafer 11 is cleaved, the wafer 11 is centered at the groove width of the plurality of cleavage grooves (21b, 22b, 23b) where the tapered tips of the first ends of the plurality of cleavage grooves (21b, 22b, 23b) are located. Is easy to cleave. Even if the plurality of cleavage grooves (21b, 22b, 23b) have a rectangular shape as shown in FIG. 6 in the cross section perpendicular to the dividing reference line 14, the plurality of cleavage grooves (21b, 22b, 23b).
- the dividing line 16 inclined in the direction of the azimuth angle with respect to the dividing reference line 14 can be corrected so as to approach the dividing reference line 14 with higher accuracy.
- the plurality of semiconductor elements 12 can be manufactured with a high manufacturing yield.
- the second end portions of the plurality of cleavage grooves (21b, 22b, 23b) on the cleavage start point 18 side have a shape that tapers toward the cleavage start point 18 side. You may have. Stress is generated in each edge portion of the plurality of cleavage grooves (21b, 22b, 23b), that is, a portion of the wafer 11 facing each of the plurality of cleavage grooves (21b, 22b, 23b). This stress is concentrated on the tapered tip of the second end of the plurality of cleavage grooves (21b, 22b, 23b).
- the wafer 11 When the wafer 11 is cleaved, the wafer 11 is centered at the groove width of the plurality of cleavage grooves (21b, 22b, 23b) where the tapered tips of the second ends of the plurality of cleavage grooves (21b, 22b, 23b) are located. Is easy to cleave. Even if the plurality of cleavage grooves (21b, 22b, 23b) have a rectangular shape as shown in FIG. 6 in the cross section perpendicular to the dividing reference line 14, the plurality of cleavage grooves (21b, 22b, 23b). ), The dividing line 16 inclined in the direction of the azimuth angle with respect to the dividing reference line 14 can be corrected so as to approach the dividing reference line 14 with higher accuracy. Thus, the plurality of semiconductor elements 12 can be manufactured with a high manufacturing yield.
- Embodiment 4 FIG. With reference to FIG. 14, the manufacturing method of the semiconductor element 12 which concerns on Embodiment 4 is demonstrated.
- the manufacturing method of the semiconductor element 12 of the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 of the first embodiment, but mainly differs in the following points.
- the manufacturing method of the semiconductor element 12 of the present embodiment includes forming a plurality of cleavage groove groups 20c.
- Each of the plurality of cleavage groove groups 20c includes a plurality of cleavage grooves (21c, 22c, 23c).
- Each of the plurality of cleavage grooves (21c, 22c, 23c) includes a first cleavage groove and a second cleavage groove that are adjacent to each other.
- the second cleavage groove is located on the opposite side (end point F side) from the cleavage starting point 18 side with respect to the first cleavage groove.
- the second groove width of the second cleavage groove is narrower than the first groove width of the first cleavage groove.
- the cleavage groove 21c and the cleavage groove 22c can be regarded as a first cleavage groove and a second cleavage groove, respectively.
- the groove width 22 ⁇ / b> W of the cleavage groove 22 is narrower than the groove width 21 ⁇ / b> W of the cleavage groove 21.
- the cleavage groove 22c and the cleavage groove 23c can be regarded as a first cleavage groove and a second cleavage groove, respectively.
- the groove width 23 ⁇ / b> W of the cleavage groove 23 is narrower than the groove width 22 ⁇ / b> W of the cleavage groove 22.
- the cleavage groove group 20c located adjacent to the active region 13 and on the cleavage start point 18 side (starting point S side) with respect to the active region 13 includes a plurality of cleavage grooves (21c, 22c, 23c).
- the cleaved groove group 20c is configured so that the groove widths (21W, 22W, 23W) of the plurality of cleaved grooves (21c, 22c, 23c) gradually decrease toward the active region 13.
- the effect of the manufacturing method of the semiconductor element 12 of the present embodiment will be described.
- the effects of the manufacturing method of the semiconductor element 12 of the present embodiment mainly have the following effects in addition to the same effects as the manufacturing method of the semiconductor element 12 of the first embodiment.
- the plurality of cleavage grooves each include a first cleavage groove and a second cleavage groove that are adjacent to each other.
- the second cleavage groove is located on the opposite side (end point F side) from the cleavage starting point 18 side with respect to the first cleavage groove.
- the second groove width of the second cleavage groove is narrower than the first groove width of the first cleavage groove. Therefore, the second cleavage groove can correct the dividing line 16 closer to the dividing reference line 14 than the first cleavage groove.
- the dividing line 16 inclined in the direction of the azimuth angle with respect to the dividing reference line 14 can be corrected so as to approach the dividing reference line 14 with higher accuracy.
- Embodiment 5 FIG. With reference to FIG. 15 to FIG. 21 and FIG. 23, a method for manufacturing the semiconductor element 12 according to the fifth embodiment will be described.
- a plurality of semiconductor elements 12 are formed on one area and the other area sandwiching division reference line 14 on wafer 11. (S11).
- the wafer 11 is cleaved in the direction of the arrow of the division reference line.
- the wafer 11 is cleaved from a starting point S indicated by a black circle to an end point F indicated by a white circle.
- the starting point S and the ending point F are located on the division reference line 14.
- the division reference line 14 and the cleavage line 15 are parallel to each other.
- the material of the wafer 11 is not particularly limited, but may be, for example, indium phosphide (InP).
- the plurality of semiconductor elements 12 may be arranged in a matrix.
- the plurality of semiconductor elements 12 include, for example, a semiconductor layer, an insulating layer, and an electrode.
- a plurality of semiconductor elements 12 may be formed on wafer 11 by the same method as in the first embodiment.
- the pair of side surfaces of the plurality of semiconductor elements 12 are formed substantially parallel to the division reference line 14.
- the semiconductor element 12 is a light emitting diode and includes an active region 13. Light is emitted from each active region 13 of the plurality of semiconductor elements 12 obtained by dividing the plurality of semiconductor elements 12.
- the direction in which the active region 13 extends is orthogonal to the dividing reference line 14 and the cleavage line 15.
- the semiconductor element 12 is not limited to a light emitting diode, and may be, for example, a transistor having a vertical structure or a horizontal structure.
- the method of manufacturing semiconductor device 12 of the present embodiment includes forming guide groove group 30 on wafer 11 (S22).
- One guide groove group 30 may be formed for one division reference line 14.
- the formation of the plurality of guide groove groups 30 (S22) may be performed simultaneously with the step of forming element isolation grooves (not shown) of the semiconductor element 12. Thereby, the time required for manufacturing the semiconductor element 12 can be shortened.
- Each of the plurality of guide groove groups 30 includes a plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35).
- the plurality of guide grooves are the first guide groove 32, the second guide groove 33, and the guide grooves 31, 34. , 35.
- the second guide groove 33 is disposed away from the first guide groove 32 toward the end point F.
- the guide groove 31 is disposed away from the first guide groove 32 toward the starting point S side.
- the guide groove 34 is disposed away from the second guide groove 33 toward the end point F.
- the guide groove 35 is disposed away from the guide groove 34 toward the end point F.
- the first guide groove 32 and the second guide groove 33 are disposed across one region and the other region sandwiching the division reference line 14. That is, the first guide groove 32 has the first side surface 32p in one region and the third side surface 32q in the other region.
- the second guide groove 33 has a second side surface 33p in one region and a fourth side surface 33q in the other region.
- the plurality of guide grooves (the first guide groove 32, the second guide groove 33, the guide grooves 31, 34, and 35) each have a groove width W1 in a direction perpendicular to the split reference line 14, and the split reference line 14 has a groove length W ⁇ b> 2 in a direction parallel to 14.
- the plurality of guide grooves (the first guide groove 32, the second guide groove 33, the guide grooves 31, 34, and 35) are disposed along the division reference line 14 with a groove interval of 30G.
- the starting point S is located closer to the cleavage starting point groove 18d than the guide groove group 30.
- the starting point S is located within the groove width W1 of the guide groove 31 in the direction perpendicular to the division reference line 14.
- the starting point S is a groove width W1 of a plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35) in a direction perpendicular to the dividing reference line 14. It may be located in the center of.
- the groove step interval S1 is equal to the side surface (for example, the first side surface 32p) far from the division reference line 14 among the side surfaces of the guide groove (for example, the first guide groove 32) along the division reference line 14 and the division reference line. 14 and the side surface (for example, the second side surface) farther from the division reference line 14 among the side surfaces of the adjacent guide groove (for example, the second guide groove 33) along the direction of the division reference line 14. 33p) and the distance between the split reference line 14.
- the groove step interval S1 is defined as a difference between the distance between the first side surface 32p and the division reference line 14 and the distance between the second side surface 33p and the division reference line 14.
- the side surface along the division reference line 14 does not have to be a side surface strictly parallel to the division reference line 14.
- the first side surface 32p and the third side surface 32q of the first guide groove 32 sandwich the division reference line 14.
- the division reference line 14 passes through the center of the first guide groove 32 in the width direction.
- the second side surface 33p and the fourth side surface 33q of the second guide groove 33 sandwich the division reference line 14.
- the division reference line 14 passes through the center in the width direction of the second guide groove 33.
- the groove step interval S1 is half of the difference between the groove widths W1 of adjacent guide grooves.
- the groove step interval S1 is about 5 ⁇ m or less
- the groove interval 30G is about 10 ⁇ m to about 100 ⁇ m
- the groove width W1 is about 10 ⁇ m.
- the depth of the guide groove is about 5 ⁇ m or more.
- the groove width W1, the groove length W2, the groove interval 30G, and the groove step interval S1 are appropriately determined according to the size and thickness of the wafer 11, the number of the plurality of semiconductor elements 12 formed in the wafer 11, and the like. obtain.
- the first side surface 32p of the first guide groove 32 and the second side surface 33p of the second guide groove 33 are located in one region sandwiching the division reference line 14.
- the first side surface 32 p of the first guide groove 32 and the second side surface 33 p of the second guide groove 33 are side surfaces along the division reference line 14.
- the first side surface 32p of the first guide groove 32 and the second side surface 33p of the second guide groove 33 are side surfaces along the direction from the starting point S to the end point F.
- the side surface along the division reference line 14 is a side surface along the direction from the starting point S to the end point F.
- the third side surface 32q of the first guide groove 32 facing the first side surface 32p is located in the other region sandwiching the division reference line 14.
- the fourth side surface 33q of the second guide groove 33 facing the second side surface 33p is located in the other region sandwiching the division reference line 14.
- the third side surface 32q of the first guide groove 32 and the fourth side surface 33q of the second guide groove 33 are side surfaces along the division reference line 14.
- the first side surface 32p and the third side surface 32q of the first guide groove 32 sandwich the division reference line 14.
- the second side surface 33p and the fourth side surface 33q of the second guide groove 33 sandwich the division reference line 14.
- the guide groove group 30 includes a plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35).
- the first guiding groove 32 is the second guiding groove from the starting point S side (second from the right on the paper surface), and the second guiding groove 33 is the third guiding groove from the starting point S side. May be.
- the second guide groove 34 from the end point F side is regarded as the first guide groove, and the guide groove 35 closest to the end point F (leftmost on the paper surface) is the second guide groove. May be considered.
- the guide groove 31 closest to the starting point S (rightmost on the paper surface) is regarded as the first guiding groove
- the second guiding groove (32) from the starting point S side is the second guide. It may be regarded as a groove.
- the guide grooves adjacent to each other are regarded as a first guide groove and a second guide groove, and the two guide grooves are repeatedly arranged to form a plurality of guide grooves (first guide groove 32, second guide groove 33, A guide groove group 30 including guide grooves 31, 34, 35) may be configured.
- the groove width W1 of the guide groove 31 closest to the starting point S (the guide groove with which the dividing line 16 first comes into contact and the rightmost groove in FIG. 17) will be described.
- the groove width W1 of the guide groove closest to the starting point S is set from the split reference line 14 to the split line 16 in the manufacturing method of the semiconductor element 12 of the comparative example in which the wafer 11 is cleaved without forming the guide groove group 30. It may be longer than twice the maximum distance.
- the dividing reference line 14 becomes the groove of the guide groove 31 as shown in FIG.
- the groove width W1 of the guide groove 31 may be about 30 ⁇ m or more.
- the plurality of guide grooves are used to etch the wafer 11 using a mask having an opening formed by a photolithography process. It may be formed. Specifically, a silicon dioxide (SiO 2 ) film is formed on the wafer 11 by sputtering, plasma chemical vapor deposition (CVD), or the like. A resist is formed on the SiO 2 film. An opening is formed in the resist using a photolithography process. Using the resist in which the opening is formed, the SiO 2 film is dry-etched to form the opening in the SiO 2 film. When dry etching is performed, a gas composed of a compound such as carbon, hydrogen, or fluorine may be used.
- a gas composed of a compound such as carbon, hydrogen, or fluorine may be used.
- the wafer 11 is etched using the SiO 2 film in which the opening is formed as a mask.
- the etching of the wafer 11 may be dry etching such as inductively coupled reactive ion etching (ICP-RIE).
- ICP-RIE inductively coupled reactive ion etching
- Forming a plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35) in the manufacturing method of the semiconductor element 12 of the present embodiment is performed by dry etching the wafer 11. Then, further wet etching may be performed. However, wet etching is a characteristic of the plurality of semiconductor elements 12 already formed before forming the plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35). Need to be done so as not to affect.
- the method for manufacturing semiconductor device 12 of the present embodiment may further include forming cleavage starting groove 18 d (S 23).
- the cleavage starting point groove 18 d is formed on the starting point S side of the guide groove group 30.
- the cleavage starting point groove 18d is formed by scribing the wafer 11 along the division reference line 14 using a needle made of a hard material such as diamond, for example. Either the guide groove group 30 (S22) or the cleavage start groove 18d (S23) may be performed first.
- the wafer 11 is ground to a predetermined thickness after the formation of the guide groove group 30 (S22) and the formation of the cleavage start groove 18d (S23). It may be further provided.
- the method for manufacturing the semiconductor element 12 of the present embodiment may further include forming the back electrode on the back surface of the wafer 11.
- the method for manufacturing semiconductor element 12 according to the present embodiment further includes cleaving wafer 11 to separate the plurality of semiconductor elements 12 from each other (S 14). Specifically, as shown in FIG. 18, a load is applied to the wafer 11 by pressing the blade 19 from the back side of the wafer 11. The wafer 11 is cleaved along the cleavage line 15 from the cleavage starting point groove 18d. As shown in FIGS. 16 and 17, the wafer 11 is cleaved along the division reference line 14 from the starting point S to the end point F indicated by a white circle, which is indicated by a black circle. In FIG.
- the cleavage plane 11s is the (0-1-1) plane, and the wafer 11 is separated from the cleavage starting point groove 18d by [01-1]. ] Or [0-11] direction.
- the method for manufacturing the semiconductor element 12 of the present embodiment includes a plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35) on the wafer 11.
- the guide groove group 30 including the guide groove group 30 is formed (S22).
- the guide groove group 30 including a plurality of guide grooves (the first guide groove 32, the second guide groove 33, the guide grooves 31, 34, and 35) is separated from the split reference line 14 due to this crack. (Refer to FIG. 18) is corrected so as to approach the division reference line 14.
- correction of the dividing line 16 by the guide groove group 30 including a plurality of guide grooves is performed.
- the dividing line 16 is shifted from the cleavage starting point groove 18 d toward the first side face 32 p of the first guide groove 32.
- the dividing line 16 extends along a cleavage line 15 parallel to the dividing reference line 14 at a position shifted from several ⁇ m to several tens of ⁇ m from the dividing reference line 14.
- the dividing line 16 contacts the guide groove 31 closest to the starting point S (the rightmost guide groove 31 on the paper surface in FIG. 19).
- the extension line of the dividing line 16 in the guide groove 31 exists inside the guide groove (first guide groove 32) adjacent to the guide groove 31 in the cleavage direction (direction from the starting point S to the end point F)
- the dividing line 16 Is not corrected by the guide groove 31.
- the extension line of the dividing line 16 in the guiding groove 31 is closer to the dividing reference line 14 than the first side surface 32p of the first guiding groove 32
- the dividing line 16 is corrected in the direction of the dividing reference line 14 by the guiding groove 31.
- the extension line of the dividing line 16 in the guiding groove 31 is positioned inside the first guiding groove 32 by a distance d 5 , the dividing line 16 is separated by the guiding groove 31. No correction is made in the direction of the division reference line 14.
- the dividing line 16 that has not been corrected by the guide groove 31 contacts the first guide groove 32.
- the dividing line 16 is Correction is made toward the dividing reference line 14 by one guide groove 32.
- the extension line of the dividing line 16 in the first guiding groove 32 is farther from the dividing reference line 14 than the second side surface 33p of the second guiding groove 33, the dividing line 16 is divided by the first guiding groove 32. Correction is made toward the line 14. Specifically, as shown in FIG.
- the dividing line 16 is Correction is made toward the dividing reference line 14 at the end of the first guide groove 32 on the cleavage direction side (end point F side).
- the dividing line 16 is corrected toward the dividing reference line 14 by a distance d 7 at the end of the second guiding groove 33 on the cleavage direction side (end point F side), similarly to the first guiding groove 32.
- This correction is repeated for a plurality of guide grooves (for example, the first guide groove 32, the second guide groove 33, and the guide groove 34), and the dividing line 16 gradually approaches the dividing reference line 14.
- the guide groove group 30 has 15 guide grooves. As shown in FIGS. 20 and 21, end portions on the cleavage direction side (end point F side) of each of the plurality of guide grooves (for example, the first guide groove 32, the second guide groove 33, and the guide groove 34). Thus, when the dividing line 16 is corrected, steps C1, C2, and C3 are formed on the dividing line 16 and the dividing surface. The steps C1, C2, and C3 are formed from a plurality of guide grooves (for example, the first guide groove 32, the second guide groove 33, and the guide groove 34) from the cleavage start point groove 18d side to the opposite side of the cleavage start point groove 18d.
- a plurality of guide grooves for example, the first guide groove 32, the second guide groove 33, and the guide groove 34
- each of the steps C1, C2, C3 is the amount of correction of the dividing line 16 and the dividing surface in each of a plurality of guiding grooves (for example, the first guiding groove 32, the second guiding groove 33, the guiding groove 34). It corresponds to.
- the steps C1, C2, and C3 are formed from the main surface 11m of the wafer 11 to the back surface of the wafer 11.
- a plurality of guide grooves (for example, the first guide groove 32, the second guide groove 33, and the guide groove 34) correct the split surface that is shifted from the split reference line 14 on the back surface of the wafer 11.
- one tapered groove 40 is formed in wafer 11 for one divided reference line 14 instead of guiding groove group 30 of the present embodiment.
- the side where the groove width of the tapered groove 40 is narrow is the cleavage direction side (end point F side).
- the tapered groove 40 has a shape in which the groove width converges toward the end point F.
- the dividing line 16 when the dividing line 16 shifted from the dividing reference line 14 contacts the tapered groove 40, the dividing line 16 is slightly corrected along the side surface of the tapered groove 40. However, the dividing line 16 does not continue to be corrected along the side surface of the tapered groove 40 by the tapered groove 40.
- a plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35 per one division reference line 14). ) Is formed on the wafer 11.
- the wafer 11 does not exist in the plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35), whereas the plurality of guide grooves (first guide groove 32).
- the wafer 11 exists around the second guide groove 33 and the guide grooves 31, 34, and 35). Therefore, a plurality of guide grooves (first guide grooves) in the edge portion of each of the plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35), that is, wafer 11 is formed.
- a stress is generated in a portion facing each of the second guide groove 33 and the guide grooves 31, 34, 35).
- cleavage is performed at the first end portion on the starting point S side and the second end portion on the end point F side of each of the plurality of guiding grooves (first guiding groove 32, second guiding groove 33, guiding grooves 31, 34, and 35). Stress is generated not only in the direction but also in the direction perpendicular to the cleavage direction (that is, the width direction of the guide groove).
- the dividing line 16 is divided at the second end in the cleavage direction of each of the plurality of guiding grooves (for example, the first guiding groove 32, the second guiding groove 33, and the guiding grooves 34, 35). Correction is made toward the line 14. Further, in the method of manufacturing the semiconductor element 12 according to the present embodiment, a plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35 with respect to one division reference line 14 are provided. ) Is formed on the wafer 11, the dividing line 16 shifted from the dividing reference line 14 can be corrected at a plurality of locations. Therefore, the plurality of guide grooves (the first guide groove 32, the second guide groove 33, the guide grooves 31, 34, and 35) can improve the accuracy of correction of the dividing line 16 toward the dividing reference line 14. it can.
- groove interval 30G is preferably as wide as possible.
- the horizontal axis in FIG. 23 indicates the dividing line 16 and the dividing reference line before the dividing line 16 contacts the plurality of guiding grooves (first guiding groove 32, second guiding groove 33, guiding grooves 31, 34, 35).
- 14 shows a distance D 1 [ ⁇ m].
- the vertical axis in FIG. 23 shows the dividing line 16 and the dividing reference after the dividing line 16 is corrected by a plurality of guiding grooves (first guiding groove 32, second guiding groove 33, guiding grooves 31, 34, 35).
- the distance D 2 [ ⁇ m] between the line 14 is shown.
- the groove interval 30G of the plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35) is 20 ⁇ m
- the plurality of guide grooves (first guide groove 32).
- the guide groove group 30 including the second guide groove 33 and the guide grooves 31, 34, and 35) can reduce the distance D 1 of 14 ⁇ m to the distance D 2 of 2 ⁇ m.
- the groove interval 30G of the plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35) is 20 ⁇ m or more, the plurality of guide grooves (first guide groove 32,
- the effect of correcting the dividing line 16 toward the dividing reference line 14 by the second guiding groove 33 and the guiding grooves 31, 34, 35) is high.
- the groove interval 30G of the plurality of guide grooves (the first guide groove 32, the second guide groove 33, the guide grooves 31, 34, 35) is too large, the number of guide grooves is reduced, and therefore a plurality of guide grooves are provided.
- the effect of correcting the dividing line 16 toward the dividing reference line 14 by the grooves is a plurality of guiding grooves (first guiding grooves).
- the groove 32, the second guide groove 33, and the guide grooves 31, 34, 35) are the same as those without the case.
- the groove interval 30G between the plurality of guide grooves is preferably about tens of ⁇ m or more and about several hundreds of ⁇ m or less.
- each of the plurality of guide grooves has a groove length W2 of 20 ⁇ m.
- a guide groove group including a plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35).
- Forming 30 (S22) may include further performing wet etching after the wafer 11 is dry-etched.
- the bottom surfaces of the plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35) are formed on the plurality of guide grooves (first guide groove 32,
- the second guide groove 33 and the guide grooves 31, 34, 35) have an inverted triangular cross-sectional shape having an acute angle toward the center of the groove width.
- a plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, 35) having an inverted triangular cross-sectional shape are formed by dividing the dividing line 16 into a plurality of guide grooves (first guide grooves).
- the groove 32, the second guide groove 33, and the guide grooves 31, 34, 35) can be corrected toward the center of the groove width.
- the dividing line 16 is shifted from the cleavage starting point groove 18d toward the third side surface 32q of the first guiding groove 32, the dividing line 16 is not corrected in the guiding groove 31 closest to the starting point S.
- the dividing line 16 is corrected toward the dividing reference line 14 at the end of the third side surface 32q of the first guide groove 32 in the cleavage direction (end point F side).
- the dividing line 16 is corrected toward the dividing reference line 14 at the end of the fourth side surface 33q of the second guide groove 33 in the cleavage direction (end point F side).
- the effect of the manufacturing method of the semiconductor element 12 of this Embodiment is demonstrated.
- a plurality of guide grooves (first guide groove 32, second guide groove 33).
- the guide grooves 31, 34, 35) correct the dividing line 16 toward the dividing reference line 14.
- the manufacturing method of the semiconductor element 12 according to the present embodiment can suppress the wafer 11 from being cleaved greatly from the division reference line 14.
- the dividing line 16 is formed of a pair of side surfaces of the first guide groove 32 along the dividing reference line 14 from the dividing reference line 14 and the cleavage starting point groove 18d (first The dividing line 16 can be corrected toward the dividing reference line 14 regardless of which side of the side surface 32p and the third side surface 32q).
- Forming a plurality of guide grooves is a step of forming an element isolation groove (not shown) of the semiconductor element 12. It may be performed simultaneously. Thereby, the manufacturing time of the semiconductor element 12 can be shortened.
- Embodiment 6 With reference to FIG. 24, the manufacturing method of the semiconductor element 12 which concerns on Embodiment 6 is demonstrated.
- the manufacturing method of the semiconductor element 12 of the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 of the fifth embodiment, but mainly differs in the following points.
- This embodiment is different from the fifth embodiment in the arrangement of a plurality of guide grooves (first guide groove 32a, second guide groove 33a, guide grooves 31a, 34a, 35a) included in the guide groove group 30a.
- the positions of the plurality of guide grooves (first guide groove 32a, second guide groove 33a, guide grooves 31a, 34a, and 35a) with respect to the division reference line 14 are different.
- a plurality of guide grooves (first guide groove 32a, second guide groove 33a, guide grooves 31a, 34a) included in the guide groove group 30a formed in the wafer 11 are used.
- 35 a) is located on the dividing reference line 14.
- the third side surface 32q of the first guide groove 32a and the fourth side surface 33q of the second guide groove 33a are located on the division reference line 14.
- the groove step interval S1 in the present embodiment is twice the groove step interval S1 in the fifth embodiment.
- the effect of the manufacturing method of the semiconductor element 12 of the present embodiment will be described.
- the effects of the manufacturing method of the semiconductor element 12 of the present embodiment mainly have the following effects in addition to the same effects as the manufacturing method of the semiconductor element 12 of the fifth embodiment.
- the guide groove group 30a of the present embodiment is similar to the guide groove group 30 of the fifth embodiment.
- the dividing line 16 is corrected toward the dividing reference line 14.
- the manufacturing method of the semiconductor element 12 according to the present embodiment can suppress the wafer 11 from being cleaved greatly from the division reference line 14.
- the dividing line 16 is corrected toward the dividing reference line 14 by a plurality of guiding grooves (first guiding groove 32a, second guiding groove 33a, guiding grooves 31a, 34a, and 35a), and the dividing line 16 is A plurality of guide grooves (first guide groove 32a, second guide groove 33a, guide grooves 31a, 34a, 35a) in contact with side surfaces (for example, third side surface 32q and fourth side surface 33q),
- the dividing line 16 is formed of a plurality of guide grooves (first guide groove 32a, second guide groove 33a, guide grooves 31a, 34a, 35a) on the split reference line 14 (for example, the third side face 32q and the first guide groove 32a). 4 side surfaces 33q).
- Embodiment 7 FIG. With reference to FIG. 25, a method of manufacturing the semiconductor element 12 according to the seventh embodiment will be described.
- the manufacturing method of the semiconductor element 12 of the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 of the fifth embodiment, but mainly differs in the following points.
- the areas of the bottom surfaces of the plurality of guide grooves (first guide groove 32b, second guide groove 33b, guide grooves 31b, 34b, and 35b) included in the guide groove group 30b formed on the wafer 11 are equal to each other.
- the area of the bottom surface of the first guide groove 32b is the same as the area of the bottom surface of the second guide groove 33b.
- One of the side surfaces along the division reference line 14 of the guide groove 31 b closest to the starting point S is located on the division reference line 14.
- the third side surface 32q of the first guide groove 32b and the fourth side surface 33q of the second guide groove 33b are located in the other region sandwiching the division reference line 14.
- One of the side surfaces along the division reference line 14 of the guide grooves 34b and 35b on the end point F side of the second guide groove 33b is located in the other region sandwiching the division reference line 14.
- the groove step interval S1 in the manufacturing method of the semiconductor element 12 according to the present embodiment is the size and thickness of the wafer 11, the number of the plurality of semiconductor elements 12 formed in the wafer 11, the groove width W1, the groove length W2, and It can be appropriately determined by the groove interval 30G or the like.
- the effect of the manufacturing method of the semiconductor element 12 of the present embodiment will be described.
- the effects of the manufacturing method of the semiconductor element 12 of the present embodiment mainly have the following effects in addition to the same effects as the manufacturing method of the semiconductor element 12 of the fifth embodiment.
- the guide groove group 30b of the present embodiment is similar to the guide groove group 30 of the fifth embodiment.
- the dividing line 16 is corrected toward the dividing reference line 14.
- the manufacturing method of the semiconductor element 12 according to the present embodiment can suppress the wafer 11 from being cleaved greatly from the division reference line 14.
- the dividing line 16 is corrected toward the dividing reference line 14 by a plurality of guiding grooves (first guiding groove 32b, second guiding groove 33b, guiding grooves 31b, 34b, and 35b). When contacted, the dividing line 16 extends along the dividing reference line 14.
- the plurality of guide grooves (first guide groove 32b, second guide groove 33b, guide grooves 31b, 34b, and 35b) have the same bottom surface area. Therefore, the area of the mask opening used when the wafer 11 is etched to form a plurality of guide grooves (first guide groove 32b, second guide groove 33b, guide grooves 31b, 34b, and 35b) is the same. It is.
- a plurality of guide grooves (first guide groove 32b, second guide groove 33b, guide grooves 31b, 34b, and 35b) included in the guide groove group 30b are simultaneously formed, a plurality of guide grooves (first guide grooves) are formed.
- the groove 32b, the second guide groove 33b, and the guide grooves 31b, 34b, and 35b) are prevented from having different depths.
- the direction toward the division reference line 14 by the plurality of guide grooves first guide groove 32b, second guide groove 33b, guide grooves 31b, 34b, and 35b.
- the accuracy of the correction of the dividing line 16 is further improved, and the wafer 11 can be further prevented from being cleaved by being greatly deviated from the dividing reference line 14.
- the opening area of the mask is different, a plurality of guide grooves having different depths are formed. If the guide groove is deep, the wafer 11 is easily broken, and if the guide groove is shallow, the dividing line 16 is difficult to be corrected.
- Embodiment 8 FIG. With reference to FIG. 26, a method of manufacturing the semiconductor element 12 according to the eighth embodiment will be described.
- the manufacturing method of the semiconductor element 12 of the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 of the fifth embodiment, but mainly differs in the following points.
- the manufacturing method of the semiconductor element 12 of the present embodiment is the same as the manufacturing method of the semiconductor element 12 of the fifth embodiment, and a plurality of guide grooves (first guide groove 32c, second guide groove) included in the guide groove group 30c. 33c, guide grooves 31c, 34c, and 35c) are different in shape.
- a plurality of guide grooves (first guide groove 32, second guide groove 33, guide grooves 31, 34, and 35) according to the fifth embodiment are viewed in plan from the main surface 11m of the wafer 11 (see FIG. 18). Sometimes it has a rectangular shape.
- the plurality of guide grooves (first guide groove 32c, second guide groove 33c, guide grooves 31c, 34c, and 35c) of the present embodiment are the main surface 11m of the wafer 11 (see FIG. 18). Has a trapezoidal shape when viewed from above.
- the shape of the plurality of guide grooves (first guide groove 32c, second guide groove 33c, guide grooves 31c, 34c, and 35c) of the present embodiment will be described by taking the first guide groove 32c as an example.
- the first side surface 32p and the third side surface 32q are side surfaces along the division reference line 14.
- the side surfaces (for example, the first side surface 32p and the third side surface 32q) along the division reference line 14 need to be strictly parallel to the division reference line 14. Absent.
- the side surface along the division reference line 14 may not be located on the division reference line 14.
- the side surface along the division reference line 14 is the division reference among the side surfaces of the plurality of guide grooves (first guide groove 32c, second guide groove 33c, guide grooves 31c, 34c, and 35c). It is a side surface in which the angle formed with the line 14 is an acute angle.
- the side surface close to the starting point S is the first connection side surface 32r
- the side surface close to the end point F is the second connection side surface 32s.
- the angle ⁇ 32 of the first guide groove 32c between the first side surface 32p and the first connection side surface 32r has an angle of 45 degrees or more and less than 90 degrees, preferably an angle of 80 degrees or more and less than 90 degrees.
- the angle ⁇ 32 of the first guide groove 32c between the third side surface 32q and the first connection side surface 32r has an angle of 45 degrees or more and less than 90 degrees, preferably an angle of 80 degrees or more and less than 90 degrees.
- the line indicating the first connection side surface 32r is longer than the line indicating the second connection side surface 32s.
- the first guide groove 32c has a trapezoidal shape with the second connection side surface 32s as an upper base and the first connection side surface 32r as a lower base. have.
- the angle ⁇ 32 of the first guide groove 32c and the angle ⁇ 32 of the first guide groove 32c have an angle of 45 degrees or more and less than 90 degrees.
- Side surfaces (for example, the first side surface 32p, the second side surface 33p, the third side surface 32q, and the fourth side surface 33q) of the first guiding groove 32c, the second guiding groove 33c, and the guiding grooves 31c, 34c, and 35c). May have an angle of about 45 degrees or less with respect to the split reference line 14.
- the distance between the second side surface 33p and the divided reference line 14 is shorter than the distance between the first side surface 32p and the divided reference line 14. .
- the first side surface 32 p and the second side surface 33 p are inclined with respect to the division reference line 14. Therefore, when comparing the distance between the second side surface 33p and the dividing reference line 14 with the distance between the first side surface 32p and the dividing reference line 14, the cleavage direction (end point) of the first side surface 32p is determined.
- the distance between the end portion on the F side) and the division reference line 14 and the distance between the end portion on the second side surface 33p in the direction opposite to the cleavage direction of the second side surface 33p (starting point S side) and the division reference line 14 Compare.
- the groove width W1 indicates a connection side surface that is close to the starting point S among a pair of connection side surfaces that connect a pair of side surfaces along the division reference line 14 when the main surface 11m (see FIG. 18) of the wafer 11 is viewed in plan.
- line length For example, the groove width W1 of the first guide groove 32c is the length of a line indicating the first connection side surface 32r when the main surface 11m of the wafer 11 (see FIG. 18) is viewed in plan.
- the groove step interval S1 is opposite to the distance between the end portion of the first side surface 32p in the cleavage direction (end point F side) and the dividing reference line 14 and the cleavage direction of the second side surface 33p (starting side S). ) Is defined as the difference between the end and the distance between the split reference line 14.
- side surfaces for example, first guiding grooves 32c, second guiding grooves 33c, guiding grooves 31c, 34c, and 35c
- the inclinations of the first side surface 32p and the second side surface 33p with respect to the division reference line 14 are all the same.
- the side surfaces for example, the first guiding groove 32c, the second guiding groove 33c, the guiding grooves 31c, 34c, and 35c
- the inclinations of the third side surface 32q and the fourth side surface 33q) with respect to the division reference line 14 are all the same.
- the dividing line 16 shifted from the dividing reference line 14 in the direction of the first side surface 32p and the second side surface 33p has a plurality of guide grooves (first guide grooves 32c) as in the fifth embodiment.
- the second guide groove 33c and the guide grooves 31c, 34c, and 35c) are not only corrected toward the dividing reference line 14 at the end of the end F side, but also on the first side surface 32p and the second side surface 33p.
- the dividing line 16 shifted from the dividing reference line 14 in the direction of the third side surface 32q and the fourth side surface 33q has a plurality of guide grooves (first guide groove 32c, second guide groove) as in the fifth embodiment.
- 33c and guide grooves 31c, 34c, 35c) are not only corrected toward the dividing reference line 14 at the end portions on the end F side, but also divided along the third side surface 32q and the fourth side surface 33q. Correction is made toward the line 14.
- the effect of the manufacturing method of the semiconductor element 12 of the present embodiment will be described.
- the effects of the manufacturing method of the semiconductor element 12 of the present embodiment mainly have the following effects in addition to the same effects as the manufacturing method of the semiconductor element 12 of the fifth embodiment.
- the guide groove group 30c of the present embodiment includes an end portion on the end point F side and a first side surface of a plurality of guide grooves (first guide groove 32c, second guide groove 33c, guide grooves 31c, 34c, and 35c).
- the dividing line 16 is corrected toward the dividing reference line 14 at 32p, the second side surface 33p, the third side surface 32q, and the fourth side surface 33q.
- the manufacturing method of the semiconductor element 12 according to the present embodiment can suppress the wafer 11 from being cleaved greatly from the division reference line 14.
- each of the guide grooves (first guide groove 32c, second guide groove 33c, guide grooves 31c, 34c, and 35c) along the direction of the division reference line 14 is used.
- the pair of side surfaces sandwich the division reference line 14. Therefore, even if the dividing line 16 shifts from the cleavage starting point groove 18d to either side of the pair of side surfaces (the first side surface 32p and the third side surface 32q) of the first guiding groove 32c along the dividing reference line 14.
- the dividing line 16 can be corrected toward the dividing reference line 14.
- the dividing line 16 when the dividing line 16 is shifted from the dividing reference line 14 to one region sandwiching the dividing reference line 14, the dividing line 16 is corrected by the first side face 32p and the second side face 33p.
- the dividing line 16 is corrected by the third side face 32q and the fourth side face 33q.
- Embodiment 9 FIG. With reference to FIG. 27, a method of manufacturing the semiconductor element 12 according to the eighth embodiment will be described.
- the manufacturing method of the semiconductor element 12 of the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 of the eighth embodiment, but mainly differs in the following points.
- This embodiment is different from the eighth embodiment in the position of the guide groove group 30d with respect to the division reference line 14.
- a plurality of guide grooves (first guide grooves 32d) included in the guide groove group 30d.
- the second guide groove 33d and the plurality of guide grooves 31d, 34d, 35d) have a trapezoidal shape.
- One of the pair of side surfaces of the plurality of guide grooves (first guide groove 32d, second guide groove 33d, guide grooves 31d, 34d, and 35d) along the split reference line 14 is located on the split reference line 14.
- the third side surface 32q of the first guide groove 32 and the fourth side surface 33q of the second guide groove 33 are located on the division reference line 14.
- side surfaces for example, a plurality of guide grooves (first guide groove 32d, second guide groove 33d, guide grooves 31d, 34d, 35d) along the division reference line 14 (for example, The inclinations of the first side face 32p and the second side face 33p) with respect to the division reference line 14 are all the same.
- the dividing line 16 shifted from the dividing reference line 14 toward the first side surface 32p and the second side surface 33p has a plurality of guiding grooves (first guiding grooves 32d as in the fifth embodiment).
- the second guide groove 33d and the guide grooves 31d, 34d, and 35d) are not only corrected toward the dividing reference line 14 at the end of the end F side, but also on the first side face 32p and the second side face 33p. Along the division reference line 14.
- the effect of the manufacturing method of the semiconductor element 12 of the present embodiment will be described.
- the effects of the manufacturing method of the semiconductor element 12 of the present embodiment mainly have the following effects in addition to the same effects as the manufacturing method of the semiconductor element 12 of the eighth embodiment.
- the guide groove group 30d of the present embodiment includes a plurality of guide grooves (first guide groove 32d, first guide groove 32d, 2, the dividing line 16 is corrected toward the dividing reference line 14 at the end F side end, the first side face 32 p and the second side face 33 p of the guiding grooves 33 d and the guiding grooves 31 d, 34 d and 35 d).
- the manufacturing method of the semiconductor element 12 according to the present embodiment can suppress the wafer 11 from being cleaved greatly from the division reference line 14.
- the dividing line 16 is corrected toward the dividing reference line 14 by a plurality of guiding grooves (first guiding groove 32d, second guiding groove 33d, guiding grooves 31d, 34d, and 35d), and the dividing line 16 is A plurality of guide grooves (first guide groove 32d, second guide groove 33d, guide grooves 31d, 34d, and 35d) are in contact with side surfaces (for example, third side surface 32q and fourth side surface 33q),
- the dividing line 16 is a side surface of the plurality of guiding grooves (first guiding groove 32d, second guiding groove 33d, guiding grooves 31d, 34d, and 35d) on the dividing reference line 14 (for example, the third side surface 32q and the second guiding groove 32d). 4 side surfaces 33q).
- Embodiment 10 FIG. With reference to FIG. 28, a method of manufacturing the semiconductor element 12 according to the tenth embodiment will be described.
- the manufacturing method of the semiconductor element 12 of the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 of the seventh embodiment, but mainly differs in the following points.
- Embodiment 7 differs from Embodiment 7 in the shapes of a plurality of guide grooves (first guide groove 32e, second guide groove 33e, guide grooves 31e, 34e, 35e) included in the guide groove group 30e.
- the plurality of guide grooves (first guide groove 32b, second guide groove 33b, guide grooves 31b, 34b, and 35b) of the seventh embodiment are the main surface 11m of the wafer 11 (see FIG. 18).
- a plan view has a rectangular shape.
- the plurality of guide grooves (first guide groove 32e, second guide groove 33e, guide grooves 31e, 34e, and 35e) of the present embodiment are the main surface 11m of the wafer 11 (see FIG. 18). Has a trapezoidal shape when viewed from above.
- the first guide groove 32e as an example, the shapes of a plurality of guide grooves (first guide groove 32e, second guide groove 33e, guide grooves 31e, 34e, 35e) of the present embodiment will be described.
- the first side surface 32p and the third side surface 32q are side surfaces along the division reference line 14.
- the side surface along the division reference line 14 does not have to be strictly parallel to the division reference line 14.
- the side surface along the division reference line 14 may not be located on the division reference line 14.
- the side surface close to the starting point S is the first connection side surface 32r
- the side surface close to the end point F is the second connection side surface 32s.
- the angle ⁇ 32 of the first guide groove 32e between the first side surface 32p and the first connection side surface 32r has an angle of 45 degrees or more and less than 90 degrees, preferably an angle of 80 degrees or more and less than 90 degrees.
- the line indicating the first connection side surface 32r is longer than the line indicating the second connection side surface 32s.
- the first guide groove 32e has a trapezoidal shape with the second connection side surface 32s as an upper base and the first connection side surface 32r as a lower base. have.
- the angle ⁇ 32 of the first guide groove 32e has an angle of 45 degrees or more and less than 90 degrees, a plurality of guide grooves (the first guide groove 32e and the second guide groove 32e along the division reference line 14).
- the side surfaces (for example, the first side surface 32p and the second side surface 33p) of the guide groove 33e and the guide grooves 31e, 34e, and 35e may have an angle of about 45 degrees or less with respect to the division reference line 14. .
- the side surfaces (for example, first guiding grooves 32e, second guiding grooves 33e, guiding grooves 31e, 34e, and 35e) along the dividing reference line 14 are provided.
- the inclinations of the first side surface 32p and the second side surface 33p with respect to the division reference line 14 are all the same.
- the side surfaces (for example, the third guide grooves 32e, the second guide grooves 33e, the guide grooves 31e, 34e, and 35e) along the division reference line 14 are provided.
- the inclinations of the side surface 32q and the fourth side surface 33q) with respect to the dividing reference line 14 are all the same.
- the dividing line 16 shifted from the dividing reference line 14 toward the first side surface 32p and the second side surface 33p has a plurality of guiding grooves (first guiding grooves 32e as in the fifth embodiment).
- the second guide groove 33e and the guide grooves 31e, 34e, 35e) are not only corrected toward the dividing reference line 14 at the end of the end point F, but also on the first side face 32p and the second side face 33p.
- the division reference line 14 is not only corrected toward the dividing reference line 14 at the end of the end point F, but also on the first side face 32p and the second side face 33p.
- the effect of the manufacturing method of the semiconductor element 12 of the present embodiment will be described.
- the effects of the manufacturing method of the semiconductor element 12 of the present embodiment mainly have the following effects in addition to the same effects as the manufacturing method of the semiconductor element 12 of the seventh embodiment.
- the guide groove group 30e of the present embodiment is similar to the guide groove group 30b of the seventh embodiment. Dividing at the end of the plurality of guide grooves (first guide groove 32e, second guide groove 33e, guide grooves 31e, 34e, 35e) on the end point F side, the first side face 32p, and the second side face 33p The line 16 is corrected toward the division reference line 14.
- the manufacturing method of the semiconductor element 12 according to the present embodiment can suppress the wafer 11 from being cleaved greatly from the division reference line 14.
- the dividing line 16 is corrected toward the dividing reference line 14 by a plurality of guiding grooves (first guiding groove 32e, second guiding groove 33e, guiding grooves 31e, 34e, and 35e). When contacted, the dividing line 16 extends along the dividing reference line 14.
- each guide groove (first guide groove 32e, second guide groove 33e, guide grooves 31e, 34e, 35e) is formed.
- the area is the same. Therefore, the area of the mask opening used when the wafer 11 is etched to form a plurality of guide grooves (first guide groove 32e, second guide groove 33e, guide grooves 31e, 34e, 35e) is the same. It is.
- a plurality of guide grooves (first guide groove 32e, second guide groove 33e, guide grooves 31e, 34e, and 35e) included in the guide groove group 30e are formed simultaneously.
- each guide groove (the first guide groove 32e, the second guide groove 33e, the guide grooves 31e, 34e, and 35e) is different.
- the manufacturing method of the semiconductor element 12 of the present embodiment the accuracy of the correction of the dividing line 16 toward the dividing reference line 14 is further improved, and the wafer 11 is cleaved greatly deviating from the dividing reference line 14. Can be further suppressed.
- Embodiment 11 FIG. With reference to FIGS. 29 to 31, a method of manufacturing the semiconductor element 12 according to the eleventh embodiment will be described.
- the manufacturing method of the semiconductor element 12 of the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 of the fifth embodiment, but mainly differs in the following points.
- the method for manufacturing semiconductor device 12 of the present embodiment includes forming a plurality of guide groove groups 30 f on wafer 11 (S 32).
- Each of the plurality of guide groove groups 30f includes a first guide groove 32f 1 , a second guide groove 33f 1 , a third guide groove 32f 2 , a fourth guide groove 33f 2, and guide grooves 31f 1 , 31f 2 , 34f 1 , 34f 2 , 35f 1 , 35f 2 are included.
- One guide groove group 30 f may be formed for one division reference line 14.
- the first guide groove 32f 1 has a first side surface 32p located in one region.
- the second guide groove 33f 1 is spaced from the first guide groove 32f 1 to the end point F side.
- the second guide groove 33f 1 has a second side surface 33p located in one region.
- the third guide groove 32f 2 has a third side surface 32q located in the other region.
- the fourth guide groove 33f 2 is spaced from the third guide groove 32f 2 toward the end point F.
- the fourth guide groove 33f 2 has a fourth side surface 33q located in the other region.
- the starting point S is on the division reference line 14.
- the starting point S is a guide groove (for example, the first guide groove 32f 1 and the second guide groove 33f 1 ) in one region across the division reference line 14 and a guide groove (for example, the third guide groove 33f 1 ) in the other region. It only has to be between the guide groove 32f 2 and the fourth guide groove 33f 2 ).
- the end point F is on the division reference line 14.
- the second guide groove 33f 1 is formed closer to the end point F than the first guide groove 32f 1 .
- the fourth guide groove 33f 2 is formed closer to the end point F than the third guide groove 32f 2 .
- the first side surface 32p, the second side surface 33p, the third side surface 32q, and the fourth side surface 33q have a plurality of guide grooves (for example, the first guide groove 32f 1 , the second guide, etc.) along the division reference line 14.
- the side surface of the groove 33f 1 , the third guide groove 32f 2, and the fourth guide groove 33f 2 is close to the dividing reference line 14.
- the fifth side face 42p of the first guide groove 32f 1 facing the first side face 32p is in one region sandwiching the division reference line 14.
- the distance between the fifth side surface 42p and the division reference line 14 is longer than the distance between the first side surface 32p and the division reference line 14.
- the sixth side surface 43p of the second guide groove 33f 1 facing the second side surface 33p is in one region sandwiching the division reference line 14.
- the distance between the sixth side surface 43p and the dividing reference line 14 is longer than the distance between the second side surface 33p and the dividing reference line 14.
- the seventh side surface 42q of the third guide groove 32f 2 facing the third side surface 32q is in the other region sandwiching the division reference line 14.
- the distance between the seventh side surface 42q and the division reference line 14 is longer than the distance between the third side surface 32q and the division reference line 14.
- Fourth eighth aspect 43q of the guide groove 33f 2 that faces the fourth side 33q is in the other areas which sandwich the divided reference line 14.
- the distance between the eighth side surface 43q and the dividing reference line 14 is longer than the distance between the fourth side surface 33q and the dividing reference line 14.
- the distance between the second side surface 33p and the division reference line 14 is shorter than the distance between the first side surface 32p and the division reference line 14.
- the distance between the fourth side surface 33q and the division reference line 14 is shorter than the distance between the third side surface 32q and the division reference line 14.
- Each guide groove (first guide groove 32f 1 , second guide groove 33f 1 , third guide groove 32f 2 , fourth guide groove 33f 2 , guide grooves 31f 1 , 31f 2 , 34f 1 , 34f 2 , 35f 1 , 35f 2 ) have the same bottom area.
- the first guide groove 32f 1 and the second guide groove 33f 1 that are adjacent to each other may be repeatedly arranged in one region sandwiching the division reference line 14. That is, the relative positional relationship between the guide groove 31f 1 and the first guide groove 32f 1 , the relative positional relationship between the second guide groove 33f 1 and the guide groove 34f 1 , and the guide groove 34f 1 and the guide
- the relative positional relationship with the groove 35f 1 is the same as the relative positional relationship between the first guide groove 32f 1 and the second guide groove 33f 1 .
- the third guide groove 32f 2 and the fourth guide groove 33f 2 adjacent to each other may be repeatedly arranged in the other region sandwiching the division reference line 14.
- the relative positional relationship between the guide groove 31f 2 and the third guide groove 32f 2 , the relative positional relationship between the fourth guide groove 33f 2 and the guide groove 34f 2 , and the guide groove 34f 2 and the guide is the same as the relative positional relationship between the third guide groove 32f 2 and the fourth guide groove 33f 2 .
- the guide groove group 30f of the present embodiment corrects the dividing line 16 shifted from the dividing reference line 14 toward the dividing reference line 14.
- the dividing line 16 that is shifted from the dividing reference line 14 toward one region sandwiching the dividing reference line 14 is corrected toward the dividing reference line 14 by the first side face 32p and the second side face 33p.
- the dividing line 16 shifted from the dividing reference line 14 toward the other region sandwiching the dividing reference line 14 is corrected toward the dividing reference line 14 by the third side face 32q and the fourth side face 33q.
- the guide groove group 30 of the fifth embodiment corrects the dividing line 16 toward the dividing reference line 14 as follows.
- the dividing line 16 contacts one guide groove.
- the extension line of the dividing line 16 in this one guiding groove is inside another guiding groove adjacent in the cleavage direction (direction from the starting point S to the ending point F)
- the dividing line 16 is not corrected in this one guiding groove.
- the extension line of the dividing line 16 in the one guiding groove is outside the other guiding groove adjacent in the cleavage direction (direction from the starting point S to the ending point F)
- the dividing line 16 is corrected in the one guiding groove.
- the Specifically, the dividing line 16 is corrected toward the dividing reference line 14 at the end of this one guide groove in the cleavage direction (end point F side).
- the guide groove group 30f of the present embodiment corrects the dividing line 16 toward the dividing reference line 14 as follows.
- the dividing line 16 contacts one guide groove.
- the extension line of the dividing line 16 in this one guiding groove is inside another guiding groove adjacent in the cleavage direction (direction from the starting point S to the ending point F)
- the dividing line 16 is corrected in this one guiding groove.
- the dividing line 16 is corrected toward the dividing reference line 14 at the end of the one guiding groove in the direction opposite to the cleavage direction (starting point S side).
- the extension line of the dividing line 16 in the one guiding groove is outside the other guiding groove adjacent in the cleavage direction (direction from the starting point S to the ending point F)
- the dividing line 16 is not corrected in the one guiding groove. .
- the manufacturing method of the semiconductor element 12 of the present embodiment basically has the same effect as the manufacturing method of the semiconductor element 12 of the fifth embodiment, but mainly differs in the following points.
- the guiding groove group 30f of the present embodiment corrects the dividing line 16 toward the dividing reference line 14.
- the manufacturing method of the semiconductor element 12 according to the present embodiment can suppress the wafer 11 from being cleaved greatly from the division reference line 14.
- the dividing line 16 has a plurality of guiding grooves (first guiding groove 32f 1 , second guiding groove) extending from the cleavage starting point groove 18d along the dividing reference line 14.
- the dividing line 16 can be corrected toward the dividing reference line 14 regardless of which side of the third side surface 32q).
- each guide groove (first guide groove 32f 1 , second guide groove 33f 1 , third guide groove 32f 2 , fourth guide groove 33f 2 , guide area of the bottom surface of the groove 31f 1, 31f 2, 34f 1 , 34f 2, 35f 1, 35f 2) are the same. Therefore, the wafer 11 is etched to form a plurality of guide grooves (first guide groove 32f 1 , second guide groove 33f 1 , third guide groove 32f 2 , fourth guide groove 33f 2 , guide groove 31f 1 , 31f 2 , 34f 1 , 34f 2 , 35f 1 , 35f 2 ), the area of the opening of the mask used is the same.
- a plurality of guide grooves (first guide groove 32f 1 , second guide groove 33f 1 , third guide groove 32f 2 ,
- the respective guide grooves (first guide grooves 32f 1 , second guides) are formed.
- the depths of the grooves 33f 1 , the third guide groove 32f 2 , the fourth guide groove 33f 2 , the guide grooves 31f 1 , 31f 2 , 34f 1 , 34f 2 , 35f 1 , 35f 2 ) can be suppressed. .
- the accuracy of the correction of the dividing line 16 toward the dividing reference line 14 is further improved, and the wafer 11 is cleaved greatly deviating from the dividing reference line 14. Can be further suppressed.
- Embodiment 12 FIG. 32 With reference to FIG. 32, a method of manufacturing the semiconductor element 12 according to the twelfth embodiment will be described.
- the manufacturing method of the semiconductor element 12 of the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 of the eleventh embodiment, but mainly differs in the following points.
- This embodiment is different from the eleventh embodiment in that a plurality of guide grooves (first guide groove 32g 1 , second guide groove 33g 1 , third guide groove 32g 2 , Of the guide grooves 33g 2 , 31g 1 , 31g 2 , 34g 1 , 34g 2 , 35g 1 , 35g 2 ).
- a plurality of guide grooves of the eleventh embodiment (first guide groove 32f 1 , second guide groove 33f 1 , third guide groove 32f 2 , fourth guide groove 33f 2 , guide grooves 31f 1 , 31f 2 , 34f 1 , 34f 2 , 35f 1 , 35f 2 ) have a rectangular shape when the main surface 11m (see FIG. 18) of the wafer 11 is viewed in plan.
- the plurality of guide grooves (first guide groove 32g 1 , second guide groove 33g 1 , third guide groove 32g 2 , fourth guide groove 33g 2 , guide groove 31g 1) of the present embodiment.
- 31 g 2 , 34 g 1 , 34 g 2 , 35 g 1 , 35 g 2 ) have a trapezoidal shape when the main surface 11 m (see FIG. 18) of the wafer 11 is viewed in plan view.
- first guide groove 32g 1 a plurality of guide grooves of the present embodiment (first guide groove 32g 1 , second guide groove 33g 1 , third guide groove 32g 2 , fourth guide groove 32g 1
- the shapes of the guide groove 33g 2 , guide grooves 31g 1 , 31g 2 , 34g 1 , 34g 2 , 35g 1 , 35g 2 ) will be described.
- the first side surface 32 p and the fifth side surface 42 p are side surfaces along the division reference line 14. In the present embodiment, the side surface along the division reference line 14 does not have to be strictly parallel to the division reference line 14. The side surface along the division reference line 14 may not be located on the division reference line 14.
- the side surface close to the starting point S is the first connection side surface 32r.
- the angle ⁇ 32 of the first guide groove 32g 1 between the first side face 32p and the first connection side face 32r has an angle greater than 90 degrees and less than or equal to 135 degrees, preferably greater than 90 degrees and 100 degrees. It has the following angle.
- the third side surface 32q and the seventh side surface 42q are side surfaces along the division reference line 14.
- the side surface close to the starting point S is the third connection side surface 42r.
- the angle ⁇ 32 of the third guide groove 32g 2 between the third side surface 32q and the third connection side surface 42r has an angle greater than 90 degrees and less than or equal to 135 degrees, preferably greater than 90 degrees and 100 degrees. It has the following angle.
- each guide groove along the division reference line 14 (for example, the first guide groove 32g 1 , the second guide groove 33g 1 , the guide grooves 31g 1 , 34g 1 , 35g 1). ) Of the pair of side surfaces closer to the division reference line 14 (for example, the first side surface 32p and the second side surface 33p) with respect to the division reference line 14 are all the same. In the other region sandwiching the division reference line 14, each guide groove along the division reference line 14 (for example, the third guide groove 32g 2 , the fourth guide groove 33g 2 , the guide grooves 31g 2 , 34g 2 , 35g 2).
- Each guide groove (first guide groove 32g 1 , second guide groove 33g 1 , third guide groove 32g 2 , fourth guide groove 33g 2 , guide grooves 31g 1 , 31g 2 , 34g 1 , 34g 2 , The areas of the bottom surfaces of 35g 1 and 35g 2 ) are the same.
- the dividing line 16 shifted from the dividing reference line 14 has a plurality of guiding grooves (first guiding groove 32g 1 , second guiding groove) as in the eleventh embodiment.
- 33 g 1 , third guide groove 32 g 2 , fourth guide groove 33 g 2 , guide grooves 31 g 1 , 31 g 2 , 34 g 1 , 34 g 2 , 35 g 1 , 35 g 2 ) 14 is corrected along the first side surface 32p and the second side surface 33p, or along the third side surface 32q and the fourth side surface 33q.
- the effect of the manufacturing method of the semiconductor element 12 of the present embodiment will be described.
- the effects of the manufacturing method of the semiconductor element 12 of the present embodiment mainly have the following effects in addition to the same effects as the manufacturing method of the semiconductor element 12 of the eleventh embodiment.
- the guide groove group 30g of the present embodiment includes a plurality of guide grooves (first guide groove 32g 1 , second guide groove 33g 1 , third guide groove 32g 2 , fourth guide groove 33g 2 , guide groove). 31 g 1 , 31 g 2 , 34 g 1 , 34 g 2 , 35 g 1 , 35 g 2 ), the end on the starting point S side, the first side surface 32 p, the second side surface 33 p, the third side surface 32 q, and the fourth side surface 33 q Then, the dividing line 16 is corrected toward the dividing reference line 14.
- the manufacturing method of the semiconductor element 12 according to the present embodiment can suppress the wafer 11 from being cleaved greatly from the division reference line 14.
- each guide groove (first guide groove 32g 1 , second guide groove 33g 1 , third guide groove 32g 2) along the direction of the dividing reference line 14 is used.
- a pair of side surfaces (for example, the first side surface 32p and the third side surface 32q) of the fourth guide groove 33g 2 , guide grooves 31g 1 , 31g 2 , 34g 1 , 34g 2 , 35g 1 , 35g 2 ,
- the division reference line 14 is sandwiched.
- the dividing line 16 is shifted from the cleavage starting point groove 18d to either side of a pair of side surfaces (for example, the first side surface 32p and the third side surface 32q) along the dividing reference line 14, the dividing line 16 is divided. It can be corrected towards the reference line 14.
- each guide groove (first guide groove 32g 1 , second guide groove 33g 1 , third guide groove 32g 2 , fourth guide groove 33g 2 , guide The areas of the bottom surfaces of the grooves 31g 1 , 31g 2 , 34g 1 , 34g 2 , 35g 1 , 35g 2 ) are the same.
- the wafer 11 is etched to form a plurality of guide grooves (first guide groove 32g 1 , second guide groove 33g 1 , third guide groove 32g 2 , fourth guide groove 33g 2 , guide grooves 31g 1 and 31g 2.
- 34g 1 , 34g 2 , 35g 1 , 35g 2 are the same in the area of the mask opening.
- a plurality of guide grooves included in the guide groove group 30g.
- the fourth guide groove 33g 2 and the guide grooves 31g 1 , 31g 2 , 34g 1 , 34g 2 , 35g 1 , 35g 2 are formed simultaneously, the respective guide grooves (first guide grooves 32g 1 , second Of the guide grooves 33g 1 , the third guide grooves 32g 2 , the fourth guide grooves 33g 2 , the guide grooves 31g 1 , 31g 2 , 34g 1 , 34g 2 , 35g 1 , 35g 2 ) are suppressed.
- the accuracy of the correction of the dividing line 16 toward the dividing reference line 14 is further improved, and the wafer 11 is cleaved greatly deviating from the dividing reference line 14. Can be further suppressed.
- Embodiment 13 FIG. With reference to FIG. 33, a method of manufacturing the semiconductor element 12 according to the thirteenth embodiment will be described.
- the manufacturing method of the semiconductor element 12 according to the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 according to the eleventh embodiment, and has the same effects, but mainly differs in the following points. .
- This embodiment is different from the eleventh embodiment in that a plurality of guide grooves (first guide groove 32h 1 , second guide groove 33h 1 , third guide groove 32h 2 , fourth guide groove 33h 2 , guide
- the arrangement of the grooves 31h 1 , 31h 2 , 34h 1 , 34h 2 , 35h 1 , 35h 2 ) is different.
- the first guide groove 32f 1 and the third guide groove 32f 2 are arranged mirror-symmetrically across the division reference line 14, and the second guide groove 33f 1 and the fourth guide groove 33f 2 is arranged in mirror symmetry with the division reference line 14 in between.
- the first guide groove 32h 1 and the third guide groove 32h 2 do not have to be arranged mirror-symmetrically across the division reference line 14, and the second guide
- the groove 33h 1 and the fourth guide groove 33h 2 may not be arranged mirror-symmetrically with the division reference line 14 in between.
- the third guide groove 32h 2 , the fourth guide groove 33h 2 , the guide grooves 31h 2 , 34h 2 , and 35h 2 are the first guide groove 32h 1 and the second guide groove.
- 33h 1 and guide grooves 31h 1 , 34h 1 , and 35h 1 may be arranged so as to be shifted to the end point F side (the side opposite to the cleavage start point groove 18d).
- Embodiment 14 FIG. With reference to FIG. 34, a method of manufacturing the semiconductor element 12 according to the fourteenth embodiment will be described.
- the manufacturing method of the semiconductor element 12 according to the present embodiment basically includes the same steps as the manufacturing method of the semiconductor element 12 according to the twelfth embodiment and has the same effects, but mainly differs in the following points. .
- This embodiment is different from Embodiment 12 in that a plurality of guide grooves (first guide groove 32i 1 , second guide groove 33i 1 , third guide groove 32i 2 , Of the guide grooves 33i 2 , 31i 1 , 31i 2 , 34i 1 , 34i 2 , 35i 1 , 35i 2 ).
- the first guide groove 32g 1 and the third guide groove 32g 2 are arranged mirror-symmetrically with respect to the division reference line 14, and the second guide groove 33g 1 and the fourth guide groove 33g 2 is arranged mirror-symmetrically with the division reference line 14 in between.
- the first guide groove 32i 1 and the third guide groove 32i 2 do not have to be arranged mirror-symmetrically across the division reference line 14, and the second guide The groove 33i 1 and the fourth guide groove 33i 2 do not have to be arranged mirror-symmetrically with the division reference line 14 in between.
- the third guide groove 32i 2 , the fourth guide groove 33i 2 , the guide grooves 31i 2 , 34i 2 , and 35i 2 are the first guide groove 32i 1 and the second guide groove.
- 33i 1, guide groove 31i 1, than 34i 1, 35i 1 may be arranged to be shifted in (the side opposite to the cleavage starting point groove 18 d) ending F side.
- Embodiment 15 FIG. A method for manufacturing the semiconductor element 12 according to the fifteenth embodiment will be described with reference to FIGS.
- the manufacturing method of the semiconductor element 12 according to the present embodiment basically includes the same steps as those of the manufacturing method of the semiconductor element 12 according to the fifth embodiment, and has the same effects, but mainly differs in the following points. .
- the manufacturing method of the semiconductor element 12 of the present embodiment further includes forming a plurality of cleavage groove groups 20j (S22).
- Each of the plurality of cleavage groove groups 20 j includes a cleavage groove 21 and a cleavage groove 22.
- the plurality of cleavage groove groups 20j are located on the division reference line 14.
- the plurality of cleavage groove groups 20j are disposed between the plurality of semiconductor elements 12 adjacent to each other.
- the wafer 11 includes a plurality of cleavage grooves 21 and 22.
- the plurality of semiconductor elements 12 are separated from the division reference line 14 by the main surface 11m of the wafer 11. (See FIG. 18).
- the cleavage line 15 is shifted from the division reference line 14 in the direction of the azimuth angle in the main surface 11m (see FIG. 18) of the wafer 11.
- the dividing line 16 shifted from the starting point S on the dividing reference line 14 is corrected toward the dividing reference line 14 by the guide groove group 30, the dividing line 16 is moved from the guiding groove group 30 to the dividing reference line 14.
- the azimuth angle ⁇ extends along the cleavage line 15 that is inclined.
- a plurality of cleavage groove groups 20j are formed. Stress is generated at the edge portion of each of the plurality of cleavage grooves 21 and 22 included in each of the plurality of cleavage groove groups 20j, that is, the portion of the wafer 11 that faces the plurality of cleavage grooves 21 and 22. At the first end portion on the starting point S side and the second end portion on the end point F side of each of the plurality of guiding grooves (first guiding groove 32, second guiding groove 33, guiding grooves 31, 34, and 35), cleavage is performed.
- the dividing line 16 is divided at the second end in the cleavage direction of each of the plurality of guiding grooves (for example, the first guiding groove 32, the second guiding groove 33, and the guiding grooves 34, 35). Correction is made toward the line 14.
- a plurality of cleavage grooves 21 and 22 are formed between the plurality of semiconductor elements 12.
- the dividing line 16 extending along the cleavage line 15 that is inclined with respect to the dividing reference line 14 becomes the plurality of cleavage grooves 21 and 22.
- the plurality of cleavage grooves 21 and 22 can correct the dividing line 16 toward the dividing reference line 14 before the dividing line 16 is largely deviated from the dividing reference line 14.
- the dividing line 16 whose azimuth angle ⁇ is inclined with respect to the dividing reference line 14 can be corrected so as to approach the dividing reference line 14 with higher accuracy.
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Abstract
Description
図1から図10を参照して、実施の形態1に係る半導体素子12の製造方法を説明する。
本実施の形態の半導体素子12の製造方法は、ウェハ11の主面11mの第1の領域に、第1の方向と第1の方向に交差する第2の方向とに沿って配列される複数の半導体素子12を形成すること(S11)を備える。本実施の形態の半導体素子12の製造方法は、ウェハ11の主面11mの第1の領域における複数の半導体素子12の間に、複数の劈開溝群20を形成すること(S12)と、第1の領域とは異なるウェハ11の主面11mの第2の領域に劈開起点部18を形成すること(S13)とを備える。本実施の形態の半導体素子12の製造方法は、分割基準線14に沿ってウェハ11を劈開して、複数の半導体素子12を互いに分離すること(S14)を備える。複数の劈開溝群20及び劈開起点部18は、分割基準線14上に配置される。複数の半導体素子12のうち、第1の方向及び第2の方向において互いに隣り合う4つの半導体素子12に対して、複数の劈開溝群20の少なくとも1つが配置される。複数の劈開溝群20は、各々、分割基準線14上に配置される複数の劈開溝21,22,23を含む。
図11及び図12を参照して、実施の形態2に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態1の半導体素子12の製造方法と同様の工程を備え、同様の効果を奏するが、主に以下の点で異なる。
図13を参照して、実施の形態3に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態1の半導体素子12の製造方法と同様の工程を備えるが、主に以下の点で異なる。
図14を参照して、実施の形態4に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態1の半導体素子12の製造方法と同様の工程を備えるが、主に以下の点で異なる。
図15から図21及び図23を参照して、実施の形態5に係る半導体素子12の製造方法を説明する。
本実施の形態の半導体素子12の製造方法では、ウェハ11を劈開して、複数の半導体素子12を互いに分離する際に、複数の誘導溝(第1の誘導溝32、第2の誘導溝33、誘導溝31,34,35)は、分割線16を分割基準線14に向けて補正する。本実施の形態の半導体素子12の製造方法は、分割基準線14から大幅にずれてウェハ11が劈開されることを抑制することができる。さらに、本実施の形態の半導体素子12の製造方法では、分割線16が、分割基準線14及び劈開起点溝18dから、分割基準線14に沿う第1の誘導溝32の一対の側面(第1の側面32pと第3の側面32q)のいずれ側にずれても、分割線16は、分割基準線14に向けて補正され得る。
図24を参照して、実施の形態6に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態5の半導体素子12の製造方法と同様の工程を備えるが、主に以下の点で異なる。本実施の形態は、実施の形態5とは、誘導溝群30aに含まれる複数の誘導溝(第1の誘導溝32a,第2の誘導溝33a,誘導溝31a,34a,35a)の配置、特に、分割基準線14に対する複数の誘導溝(第1の誘導溝32a,第2の誘導溝33a,誘導溝31a,34a,35a)の位置が異なる。
図25を参照して、実施の形態7に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態5の半導体素子12の製造方法と同様の工程を備えるが、主に以下の点で異なる。
図26を参照して、実施の形態8に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態5の半導体素子12の製造方法と同様の工程を備えるが、主に以下の点で異なる。
図27を参照して、実施の形態8に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態8の半導体素子12の製造方法と同様の工程を備えるが、主に以下の点で異なる。本実施の形態は、実施の形態8と、分割基準線14に対する誘導溝群30dの位置が異なる。
図28を参照して、実施の形態10に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態7の半導体素子12の製造方法と同様の工程を備えるが、主に以下の点で異なる。
図29から図31を参照して、実施の形態11に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態5の半導体素子12の製造方法と同様の工程を備えるが、主に以下の点で異なる。
図32を参照して、実施の形態12に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態11の半導体素子12の製造方法と同様の工程を備えるが、主に以下の点で異なる。
図33を参照して、実施の形態13に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態11の半導体素子12の製造方法と同様の工程を備え、同様の効果を奏するが、主に以下の点で異なる。
図34を参照して、実施の形態14に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態12の半導体素子12の製造方法と同様の工程を備え、同様の効果を奏するが、主に以下の点で異なる。
図35から図37を参照して、実施の形態15に係る半導体素子12の製造方法を説明する。本実施の形態の半導体素子12の製造方法は、基本的には、実施の形態5の半導体素子12の製造方法と同様の工程を備え、同様の効果を奏するが、主に以下の点で異なる。
Claims (11)
- ウェハの主面の第1の領域に、第1の方向と前記第1の方向に交差する第2の方向とに沿って配列される複数の半導体素子を形成することと、
前記ウェハの前記主面の前記第1の領域における前記複数の半導体素子の間に、複数の劈開溝群を形成することと、
前記第1の領域とは異なる前記ウェハの前記主面の第2の領域に劈開起点部を形成することと、
分割基準線に沿って前記ウェハを劈開して、前記複数の半導体素子を互いに分離することとを備え、
前記複数の劈開溝群及び前記劈開起点部は、前記分割基準線上に配置され、
前記複数の半導体素子のうち、前記第1の方向及び前記第2の方向において互いに隣り合う4つの前記半導体素子に対して、前記複数の劈開溝群の少なくとも1つが配置され、
前記複数の劈開溝群は、各々、前記分割基準線上に配置される複数の劈開溝を含む、半導体素子の製造方法。 - 前記複数の劈開溝は、前記分割基準線に直交する断面において、V字の形状を有する、請求項1に記載の半導体素子の製造方法。
- 前記劈開起点部を形成することは、前記ウェハをエッチングすることによって劈開起点溝を形成することを含む、請求項1または請求項2に記載の半導体素子の製造方法。
- 前記複数の劈開溝群及び前記劈開起点溝は共通の工程で形成される、請求項3に記載の半導体素子の製造方法。
- 前記劈開起点部側とは反対側の前記複数の劈開溝の第1端部は、前記劈開起点部側とは反対側に向かうにつれて先細となる形状を有する、請求項1から請求項4のいずれか1項に記載の半導体素子の製造方法。
- 前記劈開起点部側の前記複数の劈開溝の第2端部は、前記劈開起点部側に向かうにつれて先細となる形状を有する、請求項5に記載の半導体素子の製造方法。
- 前記複数の劈開溝群を形成することは、前記ウェハの前記主面を平面視したときに、互いに等しい底面の面積を有する前記複数の劈開溝を形成することを含む、請求項1から請求項6のいずれか1項に記載の半導体素子の製造方法。
- 前記複数の劈開溝は各々、互いに隣り合う第1の劈開溝と第2の劈開溝とを含み、
前記第2の劈開溝は、前記第1の劈開溝に対して、前記劈開起点部側とは反対側に位置し、
前記第2の劈開溝の第2の溝幅は、前記第1の劈開溝の第1の溝幅よりも狭い、請求項1から請求項6のいずれか1項に記載の半導体素子の製造方法。 - 前記複数の半導体素子は、半導体レーザまたは発光ダイオードである、請求項1から請求項8のいずれか1項に記載の半導体素子の製造方法。
- 前記複数の半導体素子は活性領域を含み、
前記複数の劈開溝群は、前記活性領域に隣り合いかつ前記活性領域に対して前記劈開起点部側に位置する第1劈開溝群と、前記活性領域に隣り合いかつ前記活性領域に対して前記劈開起点部側とは反対側に位置する第2劈開溝群とを含み、
前記複数の劈開溝群を形成することは、前記第1劈開溝群と前記活性領域との間の第1の距離が前記第2劈開溝群と前記活性領域との間の第2の距離よりも大きくなるように、前記複数の劈開溝群を形成することを含む、請求項9に記載の半導体素子の製造方法。 - 前記複数の半導体素子は、トランジスタである、請求項1から請求項8のいずれか1項に記載の半導体素子の製造方法。
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US (1) | US20180145206A1 (ja) |
JP (1) | JP6430009B2 (ja) |
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JP6245414B1 (ja) * | 2017-04-12 | 2017-12-13 | 三菱電機株式会社 | 半導体素子の製造方法 |
WO2018198753A1 (ja) * | 2017-04-24 | 2018-11-01 | 三菱電機株式会社 | 半導体デバイスの製造方法 |
JP2018186124A (ja) * | 2017-04-24 | 2018-11-22 | 三菱電機株式会社 | 半導体デバイスの製造方法 |
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CN115410927B (zh) * | 2022-09-29 | 2024-09-27 | 北京超材信息科技有限公司 | 半导体器件的切割方法 |
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Also Published As
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JPWO2017006902A1 (ja) | 2018-03-08 |
CN107851563B (zh) | 2021-07-30 |
US20180145206A1 (en) | 2018-05-24 |
JP6430009B2 (ja) | 2018-11-28 |
CN107851563A (zh) | 2018-03-27 |
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