WO2015104829A1 - 膜形成装置および膜形成方法 - Google Patents
膜形成装置および膜形成方法 Download PDFInfo
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- WO2015104829A1 WO2015104829A1 PCT/JP2014/050299 JP2014050299W WO2015104829A1 WO 2015104829 A1 WO2015104829 A1 WO 2015104829A1 JP 2014050299 W JP2014050299 W JP 2014050299W WO 2015104829 A1 WO2015104829 A1 WO 2015104829A1
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- Prior art keywords
- substrate
- film
- film forming
- liquid
- nozzles
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims description 35
- 239000000758 substrate Substances 0.000 claims abstract description 215
- 230000002093 peripheral effect Effects 0.000 claims abstract description 96
- 239000007788 liquid Substances 0.000 claims description 196
- 238000007599 discharging Methods 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 16
- 239000011521 glass Substances 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 5
- 239000010408 film Substances 0.000 description 346
- 239000012528 membrane Substances 0.000 description 21
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 238000004528 spin coating Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/1433—Structure of nozzle plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1606—Coating the nozzle area or the ink chamber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/164—Manufacturing processes thin film formation
Definitions
- the present invention relates to a technique for forming a film on a semiconductor wafer, a glass substrate, a resin substrate, or the like.
- a film liquid L is dropped on the center of a substrate (wafer) W
- a spin coating method is used in which the wafer W is rotated in the direction of the arrow A0 and the film liquid L is spread by centrifugal force.
- FIGS. 18A and 18B an air flow as shown by an arrow A2 is generated as the wafer W rotates in the direction of the arrow A0. It becomes non-uniform and causes uneven coating of the film.
- FIG. 19A in the case where there are convex portions M such as electrodes and parts on the surface of the wafer W, not only uneven coating N1 of the film starting from the convex portions M occurs, As shown in FIG. 19B, there may be a problem that bubbles N2 are generated on the outer peripheral side of the convex portion M.
- Patent Document 1 As a technique not based on the spin coating method, the nozzle is set while supplying a resist solution from a nozzle discharge hole provided above the wafer.
- the document describes reciprocating in the X direction and intermittently feeding the wafer in the Y direction. Further, it is also described that a portion other than the circuit formation region of the wafer is covered with a mask in order to prevent the resist solution from adhering to the outer peripheral edge (periphery) and the back surface of the wafer.
- Patent Document 2 is provided with a pair of liquid receiving members that receive the coating liquid falling from the nozzle and prevent the supply of the coating liquid to the outer edge region of the wafer.
- the distance between the liquid receiving members is variable in the X direction, and the tip portions of the pair of liquid receiving members can be adjusted so as to be positioned slightly inside the outer edge of the wafer regardless of the position in the Y direction of the wafer.
- a large number of discharge ports are arranged in a line over the length corresponding to the diameter of the wafer in the coating solution nozzle, and the coating solution is discharged from the discharge port.
- the coating solution is scanned and applied by translational movement from one end side to the other end side of the wafer.
- a pair of liquid receiving members that receive the coating liquid falling from a large number of discharge ports and prevent the supply of the coating liquid to the outer edge region of the wafer should be provided.
- the present invention can easily prevent the film liquid discharged to the substrate from reaching the back surface from the outer peripheral edge of the substrate and can accurately discharge the film liquid to the required position on the substrate. It is another object of the present invention to provide a film forming apparatus and a film forming method that can correct the film thickness obtained on the substrate.
- the first aspect of the present invention which was created to solve the above-described problems, is a discharge surface of an inkjet head in which a plurality of nozzles for discharging a film liquid are arranged in the width direction, and a substrate on which the film liquid is discharged from the nozzles.
- the ink jet head and the substrate are opposed to the film forming surface, and the two are moved relative to each other in a direction perpendicular to the width direction while the inkjet head and the substrate are not rotated.
- the arrangement width length of the nozzles of the inkjet head is set to be equal to or greater than the maximum length in the width direction of the film forming surface of the substrate when the substrate relatively moves.
- the number of nozzles for discharging the film liquid is variably controlled while the inkjet head and the substrate are relatively moved, regardless of the shape and posture of the substrate. This prevents the film liquid from adhering to the boundary between the film forming surface and the outer peripheral edge of the substrate from the head portion to the rear edge portion of the substrate, and avoids the problem that the film liquid reaches the outer peripheral edge and the back surface.
- no mask or liquid receiving member is required, the structure of the apparatus around the substrate is simplified, and no dripping of the film liquid from the mask or liquid receiving member is eliminated. Can be accurately discharged, and the accuracy of the film thickness on the substrate can be secured.
- BMP data determined from the relative movement position of the inkjet head and the substrate and the position of the film formation surface on the substrate is created, and the BMP data
- the plurality of nozzles of the inkjet head may be controlled based on the above.
- the aspect in which the substrate moves relative to the inkjet head is a rectangular substrate having two sides parallel to the relative movement direction and two sides orthogonal to the direction. It is advantageous that this is not the case.
- the substrate has the above-described rectangular shape
- the number of nozzles for discharging the film liquid is determined in advance, whether or not the film liquid is discharged from all of these nozzles, that is, It is only necessary to perform variable control of whether the number of nozzles for discharging the film liquid is zero or constant.
- the substrate is not in the form of a rectangle as described above, it is necessary to precisely change the number of nozzles for discharging the film liquid in the non-rectangular area protruding from the rectangular area.
- Examples of such a substrate include a substrate having a disk shape and a substrate having a square plate shape such as a rectangle, a triangle, and other polygons.
- a substrate having a disk shape and a substrate having a square plate shape such as a rectangle, a triangle, and other polygons.
- a rectangular plate-shaped substrate it is advantageous when the substrate is inclined with respect to the relative movement direction.
- the lower limit value of the film thickness after drying of the film liquid discharged toward the film forming surface of the substrate can be controlled to 300 nm and the upper limit value to 30 ⁇ m or more.
- an extremely thin film having a thickness of about 300 nm and an extremely thick film having a thickness of 30 ⁇ m or more can be accurately formed on the substrate.
- an extremely thick film of 20 ⁇ m or more or 30 ⁇ m or more it is performed by overcoating without limitation on the number of times.
- the upper limit value is set to 100 ⁇ m, for example.
- the discharge amount of the film liquid discharged toward the film forming surface of the substrate to become a usable film after drying is 95% to 100% (preferably 100%) of the total discharge amount. be able to.
- an ink jet apparatus such as an ink jet printer, that is, an ink jet head is effectively used, and waste of the film liquid can be reduced as much as possible.
- the relative moving position is applied to a non-rectangular area that discharges the film liquid from a certain number of nozzles and protrudes from the rectangular area on the film forming surface of the substrate. It is preferable to control so that the film liquid is discharged from a different number of nozzles according to the difference.
- the non-rectangular region is divided into a plurality of partial regions in the relative movement direction, and the ejection amount of the film liquid from each nozzle is variably controlled according to the plurality of partial regions. .
- the inkjet head is preferably a parallel inkjet head in which a plurality of individual inkjet heads are arranged in a staggered manner in the width direction.
- the discharge amount of the film liquid gradually increases toward the inner peripheral side, In a region continuous from the region to the inner peripheral side, it is preferable to control the discharge amount to be the same as the increased maximum discharge amount of the film liquid.
- the film liquid when the film liquid is formed with a uniform discharge amount on the film forming surface of the substrate, that is, when the liquid surface height of the film liquid is made uniform over the entire film forming surface of the substrate.
- the film thickness gradually increases as the streak region connected to the inner peripheral side of the boundary moves to the outer peripheral side. Therefore, when the film liquid is discharged, if the line-shaped region is controlled so that the discharge amount of the film liquid gradually increases as it moves to the inner peripheral side, it is uniform on the substrate after drying. A film thickness can be obtained.
- the streak region is divided into a plurality of partial streak regions from the inner peripheral side to the outer peripheral side, and the discharge amount of the film liquid from each nozzle is variable according to the plurality of partial streak regions. It is preferable to control.
- a plurality of closed regions in which a film is formed on the film forming surface by controlling discharge and non-discharge of the film liquid to the plurality of nozzles during the relative movement, and a film A region in which no film is formed can be created, and during the relative movement, a film is not formed on the film formation surface by controlling the discharge and non-discharge of the film liquid to the plurality of nozzles. It is also possible to create a plurality of closed regions and regions where a membrane is formed.
- the second aspect of the present invention which was created to solve the above-described problems, is a discharge surface of an inkjet head in which a plurality of nozzles that discharge film liquid are arranged in the width direction, and a substrate on which film liquid is discharged from the nozzles.
- the ink jet head and the substrate are opposed to the film forming surface, and the two are moved relative to each other in a direction perpendicular to the width direction while the inkjet head and the substrate are not rotated.
- the aspect in which the substrate moves relative to the ink jet head includes two sides parallel to the relative movement direction and orthogonal to this direction.
- the arrangement width length of the nozzles of the ink-jet head is not the aspect that becomes a rectangular substrate composed of two sides, and the width direction of the film forming surface of the substrate when the substrate moves relatively In the above length, until completing the relative movement of the two, it characterized the number of nozzles for discharging film liquid in the plurality of nozzles to be variably controlled.
- the third aspect of the present invention which was created to solve the above-described problems, is a discharge surface of an inkjet head in which a plurality of nozzles for discharging a film liquid are arranged in the width direction, and a substrate on which the film liquid is discharged from the nozzles.
- the ink jet head and the substrate are opposed to the film forming surface, and the two are moved relative to each other in a direction perpendicular to the width direction while the inkjet head and the substrate are not rotated.
- the discharge amount of the film liquid gradually increases toward the inner peripheral side in the streaky region continuous from the outer peripheral end of the film forming surface of the substrate to the inner peripheral side. In the region that extends from the streaky region to the inner peripheral side, the discharge amount is controlled to be the same as the increased maximum discharge amount of the film liquid.
- the following effects can be obtained. That is, when the film liquid is formed with a uniform discharge amount on the film forming surface of the substrate, that is, when the liquid surface height of the film liquid is made uniform over the entire area of the film forming surface of the substrate, After drying, the film thickness gradually increases as the streaky region extending from the outer peripheral edge of the film forming surface to the inner peripheral side moves to the outer peripheral side. Therefore, when the film liquid is discharged, if the line-shaped region is controlled so that the discharge amount of the film liquid gradually increases as it moves to the inner peripheral side, it is uniform on the substrate after drying. A film thickness can be obtained.
- the substrate may be a semiconductor wafer, a glass substrate, or a resin substrate.
- a fourth aspect of the present invention created to solve the above-described problems is a discharge surface of an inkjet head in which a plurality of nozzles for discharging a film liquid are arranged in the width direction, and a substrate on which the film liquid is discharged from the nozzles.
- the ink jet head and the substrate are opposed to the film forming surface, and the two are moved relative to each other in a direction perpendicular to the width direction while the inkjet head and the substrate are not rotated.
- the arrangement width length of the nozzles of the inkjet head is set to be equal to or greater than the maximum length in the width direction of the film forming surface of the substrate when the substrate relatively moves.
- the discharged film liquid is attached to the film of the substrate. Formation And to stop at the boundary between the outer peripheral end portion, it characterized the number of nozzles for discharging film liquid in the plurality of nozzles to be variably controlled.
- a fifth invention created in order to solve the above-described problems is directed to an ejection surface of an inkjet head in which a plurality of nozzles that eject film liquid are arranged in the width direction, and a film of a substrate from which the film liquid is ejected from the nozzles
- the film is formed from the nozzle to the film forming surface of the substrate while the inkjet head and the substrate are moved in a non-rotating state relative to each other in a direction orthogonal to the width direction.
- the film forming method configured to discharge liquid an aspect when the substrate moves relative to the inkjet head is perpendicular to the two sides parallel to the relative moving direction.
- the width of the nozzles of the inkjet head is set to the maximum in the width direction of the film forming surface of the substrate when the substrate relatively moves.
- the number of nozzles for discharging film liquid in the plurality of nozzles to be variably controlled.
- the sixth aspect of the present invention which was created to solve the above-described problems, is a discharge surface of an inkjet head in which a plurality of nozzles for discharging a film liquid are arranged in the width direction, and a substrate on which the film liquid is discharged from the nozzles.
- the ink jet head and the substrate are opposed to the film forming surface, and the two are moved relative to each other in a direction perpendicular to the width direction while the inkjet head and the substrate are not rotated.
- the discharge amount of the film liquid gradually increases toward the inner peripheral side in the streaky region continuous from the outer peripheral end of the film forming surface of the substrate to the inner peripheral side.
- the region that extends from the streaky region to the inner peripheral side is characterized in that the discharge amount is controlled to be the same as the increased maximum discharge amount of the film liquid.
- the film liquid discharged to the substrate can be easily prevented from reaching the back surface from the outer peripheral edge of the substrate, and the film liquid can be accurately discharged to the required position on the substrate. And the film thickness obtained on the substrate can be accurate.
- FIG. 1 is a perspective view showing a schematic configuration of a film forming apparatus according to a first embodiment of the present invention. It is the schematic which shows an example of the arrangement state of the nozzle in the lower surface of the inkjet head which is a component of the film forming apparatus which concerns on 1st Embodiment of this invention. It is a schematic front view which shows the 1st example of the film
- FIG. 5a It is a schematic front view which shows the 3rd example of the film
- FIG. 6a It is a schematic plan view for demonstrating the discharge state of the film
- the film forming apparatus and the film forming method according to the first embodiment of the present invention will be described.
- a disk-shaped substrate 2 made of a semiconductor wafer is transported in the direction of arrow A, and a Pied inkjet head 3 is fixed above the transport path. is set up.
- the inkjet head 3 is a side-by-side inkjet head in which a plurality (five in the illustrated example) of individual inkjet heads 3 a are arranged in a staggered manner in the width direction B perpendicular to the transport direction A.
- a plurality of nozzles 4 are arranged in the width direction B at the same nozzle pitch 4P on the lower surface (ejection surface) of each individual inkjet head 3a in the inkjet head 3. Therefore, in the ink jet head 3 as a whole, a large number of nozzles 4 are arranged in the width direction B at a constant nozzle pitch 4P. Data indicating the positions of all the nozzles 4 is stored in the storage unit 5 of the inkjet head 3.
- BMP data bitmap data
- This BMP data indicates the number of nozzles 4 for discharging the film liquid to each nozzle 4 of the inkjet head 3, the discharge amount of the film liquid from each nozzle 4, and whether or not the film liquid is discharged from each nozzle 4. Can be specified. Therefore, the discharge pitch of the film liquid of each nozzle 4 can be arbitrarily specified.
- the transport speed of the substrate 2 is set to 2 mm / sec to 100 mm / sec, preferably 10 mm / sec to 50 mm / sec.
- the transport speed of the substrate 2 depends on the discharge amount of the film liquid from the nozzle 4 and the discharge speed.
- the frequency is appropriately set in consideration of the arrangement state of the nozzles 4 and the like.
- the coating state of the film liquid on the film forming surface 2A of the substrate 2 per unit area is the case where the film liquid 6 is discharged from all the nozzles 4 of the ink jet head 3 (100 %), In the relationship between the nozzle pitch 4P and the discharge pitch Ap in the transport direction, all the film liquids 6 (lines forming the circle shape shown in the figure) are overlapped without a gap.
- FIG. 2 shows an example of the arrangement state of the nozzles 4 on the lower surface of the inkjet head 3.
- Two line-type inkjet nozzles 3 b are attached in parallel to the lower surface of each individual inkjet head 3 a in the inkjet head 3.
- the position of each nozzle 4 of one line-type inkjet nozzle 3b and the position of each nozzle 4 of the other line-type inkjet nozzle 3b are shifted in the width direction B by a half pitch of the nozzle pitch 4P.
- the substantial nozzle array pitch of the inkjet head 3 as a whole is 1 ⁇ 2 of the nozzle pitch 4P of the individual line-type inkjet nozzles 3b.
- the number of line-type inkjet nozzles 3b and the arrangement state of the nozzles 4 are not limited thereto.
- FIG. 3A shows a film having a predetermined discharge amount when the discharge data corresponding to one nozzle 4 is turned on once on the BMP data of the image data in a method called a binary mode. In this mode, only one drop of the liquid 6 is discharged.
- FIG. 3B shows a method called a multi-drop mode, and a number from 1 to 7 (3 in this example) is added to the ejection data corresponding to one nozzle 4 on the BMP data of the image data. In this case, it is a mode in which three drops of the predetermined amount of film liquid 6 are discharged continuously by turning on once.
- FIG. 3A shows a film having a predetermined discharge amount when the discharge data corresponding to one nozzle 4 is turned on once on the BMP data of the image data in a method called a binary mode. In this mode, only one drop of the liquid 6 is discharged.
- FIG. 3B shows a method called a multi-drop mode, and a number from 1 to 7 (3 in this example) is added to the e
- 3C shows a method called a DPN mode, in which the discharge amount data is input to the discharge data corresponding to one nozzle 4 on the BMP data of the image data, and is turned on only once. In this mode, the film liquid 6 having the input discharge amount is discharged.
- the binary mode method shown in FIG. 3A is adopted. The reason is that the binary mode method does not require complicated electric control compared to the other two methods.
- FIG. 4 illustrates a mode in which the film liquid 6 is ejected from the inkjet head 3 to the film forming surface 2A on the surface of the substrate 2. Since the film forming surface 2A of the substrate 2 is circular, its outline does not coincide with the transport direction A and does not coincide with the width direction B, and the arrangement length of the nozzles of the inkjet head 3 in the width direction is the film of the substrate 2 It is longer than the maximum length in the width direction of the formation surface 2A (the diameter D1 of the film formation surface 2A). Then, the entire circular area as the film forming surface 2A has three rectangular areas 20 that are present in the center in the width direction B and whose corner portions are in contact with the circular outline, two left and right partial circular areas 21, and six upper and lower parts.
- the number of nozzles 4 that discharge the film liquid in the inkjet head 3 is a fixed number regardless of the movement position in the transport direction A.
- the film liquid is discharged from the fixed number of nozzles 4 (all nozzles 4 in this embodiment).
- the number of nozzles 4 for discharging the film liquid in the inkjet head 3 changes according to the difference in the movement position in the transport direction A.
- the discharge state of the film liquid follows a circular outline, and as a result, the film liquid is discharged so as to be an accurate circle over the entire area of the circular film formation surface 2A.
- the control as described above is performed by the control means 7 (see FIG. 1) based on the BMP data stored in the storage means 5.
- the two left and right partial circular regions 21 are each divided into a plurality (12 in the example) of regions a to l with respect to the transport direction A.
- the discharge amount of the film liquid from each nozzle 4 changes.
- Each of the four upper and lower partial areas 22 excluding the upper and lower areas in the center in the width direction B is divided into a plurality (6 in the illustrated example) of areas a to f with respect to the transport direction A. Accordingly, the discharge amount of the film liquid from each nozzle 4 changes.
- Each of the upper and lower partial circular regions 22 at the center in the width direction B is also divided into a plurality of regions with respect to the transport direction A, and the film liquid from the individual nozzles 4 is divided according to their difference.
- the discharge amount may be changed, but such a thing may not be performed.
- the control as described above is performed by the control means 7 based on the BMP data stored in the storage means 5.
- the film thickness immediately after the discharge becomes non-uniform.
- a phenomenon is called a crosstalk phenomenon.
- the number of nozzles 4 that discharge the film liquid is small, the discharge amount of the film liquid from each nozzle 4 increases, and when the number of nozzles 4 that discharge the film liquid is large, The amount of film liquid discharged from each nozzle 4 is reduced. Therefore, if only the number of nozzles 4 for discharging the film liquid is changed in the above-described eight (or six) partial circular regions 21 and 22, the film thickness immediately after the discharge becomes non-uniform. Specifically, in the partial circular region 21 shown in FIG.
- the number of nozzles 4 that discharge the film liquid gradually decreases as the region moves from the central portion in the vertical direction to both ends. Therefore, the film 8 immediately after being discharged onto the film forming surface 2A on the surface of the substrate 2 has a thin film thickness at the center in the vertical direction as shown in FIG. Gradually, the film thickness increases. Therefore, in this embodiment, as shown in FIG. 6A (that is, as shown in FIG. 4), the partial circular area 21 is divided into a plurality of (for example, 12) areas a to l in the transport direction A.
- the discharge amount of the film liquid from each nozzle 4 is increased in the regions f and g in the central portion in the vertical direction, and the discharge amount is decreased as the region moves to the regions on both ends.
- the film 8 immediately after being discharged onto the film forming surface 2A on the surface of the substrate 2 has a uniform film thickness over the entire area a to l in the vertical direction.
- the discharge amount of the film liquid from the individual nozzles 4 for the above-mentioned 12 regions is measured in advance with a weigh scale and stored in the storage means 5.
- the control means 7 may automatically correct the discharge amount of the film liquid in the partial circular region 21 to be uniform. Then, by performing the same for the other partial circular regions 21 and 22, the film thickness immediately after ejection is uniform over the entire region of the circular film forming surface 2A.
- the control as described above is performed by the control means 7 based on the BMP data stored in the storage means 5.
- FIG. 7A shows a coating state of the film 8 having a uniform film thickness immediately after ejection on the substrate 2.
- This application state prevents the film liquid from adhering from the curved outer peripheral end 2b of the substrate 2 toward the back surface 2c, and the boundary 2d between the curved outer peripheral end 2b and the planar film forming surface 2A.
- the film 8 (film liquid) is prevented from adhering. Therefore, the outer peripheral end 8b of the film 8 is located at or near the boundary 2d between the curved outer peripheral end 2b of the substrate 2 and the planar film forming surface 2A.
- the portion that can be regarded as the outer peripheral end of the substrate 2 and the planar film forming surface 2A The boundary is the position of the outer peripheral end 8 b of the film 8. In other words, the outer peripheral end 8 b of the film 8 does not have to reach the back surface side portion 2 e in the outer peripheral end 2 b of the substrate 2.
- the surface (upper surface) 8c of the film 8 in the streak region 23 immediately after the discharge of the film liquid is inclined downward from the inner peripheral side toward the outer peripheral side and is curved slightly concavely.
- the film thickness becomes uniform over the entire region from the outer peripheral end 8Ab to the center of the film 8A. Specific control for this is performed as follows.
- the circular film-forming surface 2A on the substrate 2 is divided into a plurality of (12 in the illustrated example) fan-shaped regions 24 in the circumferential direction at an equal angle, and the outermost streaks are further formed.
- the region 23 is divided into a plurality of (six in the illustrated example) partial arc-shaped regions a to f in the radial direction.
- the discharge amount of the film liquid from the nozzle 4 is corrected for each of the six partial arc-shaped regions a to f.
- the film thickness of the dried film 8A is made uniform.
- the reason why the film liquid is divided into 12 parts in the circumferential direction without correcting the discharge amount of the film liquid from the nozzle 4 all over the circumference of the streak region 23 is to ensure easy control and accuracy.
- the correction data individually corrected for the sector area 24 divided into 12 is stored in the storage means 5.
- this notch part 2B is formed in the upper end of the figure, as shown in FIG. 10, this notch part 2B is divided into a plurality of (6 in the illustrated example) in the radial direction as one partition part. If the discharge amount is corrected in the same manner as described above for the V-type regions a to f, the notch portion 2B also has a uniform film thickness after drying. can get. Even when an orientation flat having a shape other than the notch portion 2B is provided, the same thing is performed on the orientation flat.
- the control as described above is performed by the control means 7 based on the BMP data stored in the storage means 5.
- FIG. 11 is a schematic plan view of the film forming apparatus 1 according to the second embodiment of the present invention, in which the film liquid 6 is discharged from the inkjet head 3 onto the film forming surface 2A on the surface of the substrate 2. Illustrated.
- the film forming apparatus 1 according to the second embodiment is greatly different from that according to the first embodiment described above, in that the substrate 2 is a rectangular glass substrate or a resin substrate, and is in the transport direction A. It is a point with an inclined posture. Therefore, as shown in FIG. 11, the outline of the substrate 2 does not coincide with the transport direction A and does not coincide with the width direction B, and the arrangement length of the nozzles of the inkjet head 3 in the width direction is the film formation surface of the substrate 2.
- the entire rectangular area that is the film forming surface 2A is composed of three rectangular areas 25 that are present at the center in the width direction B and whose corners are in contact with the rectangular outline, two non-rectangular areas 26 on the left and right sides, and upper and lower eight areas. It is divided into a non-rectangular area 27.
- the number of nozzles 4 that discharge the film liquid in the inkjet head 3 is a fixed number regardless of the movement position in the transport direction A. Specifically, the three individual inkjets The film 3 is discharged from the fixed number of nozzles 4 (all nozzles 4 in this embodiment) by the head 3a.
- each of the two left and right non-rectangular regions 26 is divided into a plurality of (four in the illustrated example) regions a to d with respect to the transport direction A, and individual nozzles are selected according to the difference between these regions.
- the discharge amount of the film liquid from 4 changes.
- Each of the eight upper and lower non-rectangular regions 27 is divided into a plurality (six in the example (five are five)) of regions a to f (some are a to e) in the conveyance direction A.
- the discharge amount of the film liquid from each nozzle 4 changes according to the difference in these regions, and control for making the film thickness non-uniformity of the film 8 immediately after the discharge onto the substrate 2 uniform.
- 8 is substantially the same as that described with reference to Fig. 8 (a) and Fig. 8 (b), and formation of the outer peripheral end 2b of the substrate 2 and the films 8 and 8A.
- the relationship with the position is substantially the same as that described with reference to FIGS.
- FIG. 12 is a schematic plan view of the film forming apparatus 1 according to the third embodiment of the present invention, in which the film liquid 6 is discharged from the inkjet head 3 onto the film forming surface 2A on the surface of the substrate 2. Illustrated.
- the film forming apparatus 1 according to the third embodiment is greatly different from that according to the second embodiment described above in that the substrate 2 made of a rectangular glass substrate or a resin substrate is not inclined with respect to the transport direction A. It is a point that is regarded as a posture.
- the arrangement length of the nozzles of the inkjet head 3 in the width direction is longer than the maximum length L2 in the width direction of the film formation surface 2A of the substrate 2 (the length of one side of the film formation surface 2A).
- the number of nozzles 4 for discharging the film liquid in the inkjet head 3 changes with respect to the film forming surface 2A on the substrate 2 when the lower side of the rectangular film forming surface 2A passes through.
- strict control is necessary for the positional relationship between the outer peripheral end 2b of the substrate 2 and the film forming surface 2A.
- the three rectangular regions 28 in the central portion in the width direction B are discharged from the fixed number of nozzles 4 (all nozzles 4 in this embodiment) by the three individual inkjet heads 3. Is discharged.
- the film liquid is discharged from a smaller number of nozzles 4 than the predetermined number. Therefore, in these two partial rectangular areas 29, the discharge amount of the film liquid from each nozzle 4 is reduced as compared with the three rectangular areas 28 in the central portion.
- the control for making the non-uniformity of the film thickness of the film 8A after drying substantially the same control as that described with reference to FIGS. 8 (a) and 8 (b). Is called.
- the relationship between the outer peripheral end 2b of the substrate 2 and the positions where the films 8 and 8A are formed is substantially the same as that described with reference to FIGS.
- FIG. 13 illustrates the film forming apparatus 1 according to the fourth embodiment of the present invention.
- the film forming apparatus 1 according to the fourth embodiment is different from those according to the first, second, and third embodiments described above in that the substrate 2 has a circular or inclined rectangular or non-inclined attitude.
- the film 8A after drying is controlled by electrically variably controlling the discharge amount of the film liquid from the required nozzle 4 of the ink jet head 3.
- the film thickness is uniform. Further, in this case, bubbles are not generated.
- Other controls are substantially the same as those in the first, second, and third embodiments described above.
- FIG. 14 illustrates a film forming apparatus 1 according to the fifth embodiment of the present invention.
- the film forming apparatus 1 according to the fifth embodiment is different from those according to the first, second, and third embodiments described above in that the substrate 2 has a circular or inclined rectangular or non-inclined attitude.
- the amount of film liquid discharged from the required nozzle 4 of the ink jet head 3 is electrically variably controlled, and after drying The surface (upper surface) of the film 8A in FIG. Further, in this case as well, no bubbles are generated.
- Other controls are substantially the same as those in the first, second, and third embodiments described above.
- FIG. 15A and 15B illustrate the film forming apparatus 1 according to the sixth embodiment of the present invention.
- the film forming apparatus 1 according to the sixth embodiment is different from those according to the first, second, and third embodiments described above in that a circular film forming surface 2A on a circular substrate 2 in plan view,
- a plurality of closed regions 10 in which no film is formed and regions 11 in which a film is formed are created on a film forming surface 2A having a rectangular or non-inclined posture in a rectangular shape in plan view.
- Other controls are substantially the same as those in the first, second, and third embodiments described above.
- FIGS. 16A and 16B illustrate a film forming apparatus 1 according to the seventh embodiment of the present invention.
- the film forming apparatus 1 according to the seventh embodiment is different from those according to the first, second, and third embodiments described above in that a circular film forming surface 2A on a circular substrate 2 in plan view,
- a plurality of closed regions 11 where a film is formed and regions 10 where a film is not formed are created on a film forming surface 2A having a rectangular or non-inclined posture on a rectangular substrate 2 in plan view. is there.
- Other controls are substantially the same as those in the first, second, and third embodiments described above.
- FIG.7,8,9 may be any structure shown in the above-mentioned FIG.7,8,9 to the peripheral part of each closed region 11.
- the film 8A after drying formed on the substrate 2 can have a lower limit of 300 nm and an upper limit of 30 ⁇ m or more, for example, 50 ⁇ m.
- the wasted film liquid is a small amount of film liquid coming out of the nozzle 4 when the surface of the nozzle 4 is cleaned before the film 8A is formed, and the nozzle surface after the surface of the nozzle 4 is cleaned. It is the sum total of the film solution that has been standby shot (discarded) by a small amount in order to adjust the thickness. Therefore, when the film 8A is actually formed on the film forming surface 2A of the substrate 2, 100% or almost 100% of the total discharge amount of the film liquid discharged from the inkjet head 3 is used for forming the film 8A. Will be.
- the outer peripheral ends 8b and 8Ab of the films 8 and 8A are positioned at the boundary 2d between the outer peripheral end 2b of the substrate 2 and the planar film forming surface 2A as shown in FIG.
- the outer peripheral ends 8b and 8Ab of the films 8 and 8A may be on the inner peripheral side or on the outer peripheral side with respect to the boundary 2d. Therefore, the configuration shown in FIG. 9 may also be on the inner peripheral side or the outer peripheral side with respect to the illustrated state.
- five individual inkjet heads 3 are used. However, the number is not limited. For example, only one individual inkjet head 3 may be used.
- the present invention is applied when the film liquid 6 is discharged from all the nozzles 4 of the inkjet head 3 (in the case of 100% discharge state), but 70% to 95% or 85%.
- the discharge state may be up to 95%.
- the film solution 6 used in the above embodiment is not particularly limited as long as it forms a functional film such as a photosensitive insulating film, a non-photosensitive insulating film, a resist film, a UV film, or other films. It is not something.
- the formation of the film 8A is completed while the substrate 2 is moved once in the transport direction A. However, while the substrate 2 is moved twice or more (including reciprocating motion).
- the formation of the film 8A may be completed.
- the film formation surface 2A of the substrate 2 is divided into a plurality of regions as necessary, and for each region divided by one movement of the substrate 2.
- the film 8A may be formed.
- the substrate 2 is moved and the inkjet head 3 is fixedly installed.
- the inkjet head 3 may be moved and the substrate 2 may be fixedly installed.
- both 2 and 3 may move.
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Abstract
Description
2 基板
2A 基板の膜形成面
2b 基板の外周端部
2c 基板の裏面
3 インクジェットヘッド
3a 個別インクジェットヘッド
4 ノズル
5 記憶手段
6 膜液
7 制御手段
8 膜(吐出直後の膜)
8A 膜(乾燥後の膜)
9 凸部
Claims (21)
- 膜液を吐出する複数のノズルが幅方向に配列されたインクジェットヘッドの吐出面と、前記ノズルから膜液が吐出される基板の膜形成面とを対向させて、前記インクジェットヘッド及び前記基板を非回転状態で、この両者を前記幅方向と直交する方向に相対的に移動させながら、前記ノズルから前記基板の膜形成面に前記膜液を吐出するように構成した膜形成装置において、
前記インクジェットヘッドのノズルの配列幅長さを、前記基板が相対的に移動する際における該基板の膜形成面の幅方向最大長さ以上にして、前記両者の相対的な移動を完了させるまでの間に、前記膜液が前記基板の外周端部から裏面側に向かって付着することを抑制するために前記吐出された膜液の付着を前記基板の膜形成面と外周端部との境界で止めるべく、前記複数のノズルにおける膜液を吐出するノズルの個数を可変制御するように構成したことを特徴とする膜形成装置。 - 前記基板が前記インクジェットヘッドに対して相対的に移動する際の態様が、その相対的な移動方向に平行な二辺と、この方向に直交する二辺とからなる矩形の基板となる態様ではないことを特徴とする請求項1に記載の膜形成装置。
- 前記基板は、円板状をなすことを特徴とする請求項2に記載の膜形成装置。
- 前記基板は、角板状をなすことを特徴とする請求項2に記載の膜形成装置。
- 前記基板の膜形成面に向かって吐出された膜液の乾燥後における膜厚は、下限値が300nmに且つ上限値が30μm以上に制御可能であることを特徴とする請求項1~4の何れかに記載の膜形成装置。
- 前記基板の膜形成面に向かって吐出されて乾燥後に使用可能な膜になった膜液の吐出量は、全吐出量の95%~100%であることを特徴とする請求項1~5の何れかに記載の膜形成装置。
- 前記基板の外周端にコーナー部が接し、且つ前記相対的な移動方向に平行な二辺と、この方向に直交する二辺とからなる矩形領域に対しては、前記相対的な移動位置の別異に関わらず一定数のノズルから膜液を吐出し、前記基板の膜形成面のうち前記矩形領域から食み出した非矩形領域に対しては、前記相対的な移動位置の別異に応じて異なる個数のノズルから膜液を吐出するように制御することを特徴とする請求項2~6の何れかに記載の膜形成装置。
- 前記非矩形領域を、前記相対的な移動方向に複数の部分領域に区分し、それら複数の部分領域に応じて、個々のノズルからの膜液の吐出量を可変制御することを特徴とする請求項2~7の何れかに記載の膜形成装置。
- 前記インクジェットヘッドは、複数個の個別インクジェットヘッドが幅方向に対して千鳥状に配列された並設インクジェットヘッドであることを特徴とする請求項1~8の何れかに記載の膜形成装置。
- 前記基板の膜形成面と外周端部との境界の内周側に連なる筋状の領域では、内周側に向かって漸次膜液の吐出量が増加し、該筋状の領域から内周側に連なる領域では、その増加した膜液の最大吐出量と同一の吐出量となるように制御することを特徴とする請求項1~9の何れかに記載の膜形成装置。
- 前記筋状の領域を、内周側から外周側にかけて複数の部分筋状領域に区分し、それら複数の部分筋状領域に応じて、個々のノズルからの膜液の吐出量を可変制御することを特徴とする請求項10に記載の膜形成装置。
- 前記相対的な移動時に、前記複数のノズルに対して膜液の吐出と非吐出とを制御することにより、前記膜形成面に膜が形成される複数の閉鎖領域と、膜が形成されない領域とを作り出すことを特徴とする請求項1~11の何れかに記載の膜形成装置。
- 前記相対的な移動時に、前記複数のノズルに対して膜液の吐出と非吐出とを制御することにより、前記膜形成面に膜が形成されない複数の閉鎖領域と、膜が形成される領域とを作り出すことを特徴とする請求項1~11の何れかに記載の膜形成装置。
- 膜液を吐出する複数のノズルが幅方向に配列されたインクジェットヘッドの吐出面と、前記ノズルから膜液が吐出される基板の膜形成面とを対向させて、前記インクジェットヘッド及び前記基板を非回転状態で、この両者を前記幅方向と直交する方向に相対的に移動させながら、前記ノズルから前記基板の膜形成面に前記膜液を吐出するように構成した膜形成装置において、
前記基板が前記インクジェットヘッドに対して相対的に移動する際の態様が、その相対的な移動方向に平行な二辺と、この方向に直交する二辺とからなる矩形の基板となる態様ではなく、
前記インクジェットヘッドのノズルの配列幅長さを、前記基板が相対的に移動する際における該基板の膜形成面の幅方向最大長さ以上にして、前記両者の相対的な移動を完了させるまでの間に、前記複数のノズルにおける膜液を吐出するノズルの個数を可変制御することを特徴とする膜形成装置。 - 膜液を吐出する複数のノズルが幅方向に配列されたインクジェットヘッドの吐出面と、前記ノズルから膜液が吐出される基板の膜形成面とを対向させて、前記インクジェットヘッド及び前記基板を非回転状態で、この両者を前記幅方向と直交する方向に相対的に移動させながら、前記ノズルから前記基板の膜形成面に前記膜液を吐出するように構成した膜形成装置において、
前記基板の膜形成面の外周端から内周側に連なる筋状の領域では、内周側に向かって漸次膜液の吐出量が増加し、該筋状の領域から内周側に連なる領域では、その増加した膜液の最大吐出量と同一の吐出量となるように制御することを特徴とする膜形成装置。 - 前記基板は、半導体ウエハであることを特徴とする請求項1~3、5~15の何れかに記載の膜形成装置。
- 前記基板は、ガラス基板であることを特徴とする請求項1~15の何れかに記載の膜形成装置。
- 前記基板は、樹脂基板であることを特徴とする請求項1~15の何れかに記載の膜形成装置。
- 膜液を吐出する複数のノズルが幅方向に配列されたインクジェットヘッドの吐出面と、前記ノズルから膜液が吐出される基板の膜形成面とを対向させて、前記インクジェットヘッド及び前記基板を非回転状態で、この両者を前記幅方向と直交する方向に相対的に移動させながら、前記ノズルから前記基板の膜形成面に前記膜液を吐出する膜形成方法において、
前記インクジェットヘッドのノズルの配列幅長さを、前記基板が相対的に移動する際における該基板の膜形成面の幅方向最大長さ以上にして、前記両者の相対的な移動を完了させるまでの間に、前記膜液が前記基板の外周端部から裏面側に向かって付着することを抑制するために前記吐出された膜液の付着を前記基板の膜形成面と外周端部との境界で止めるべく、前記複数のノズルにおける膜液を吐出するノズルの個数を可変制御することを特徴とする膜形成方法。 - 膜液を吐出する複数のノズルが幅方向に配列されたインクジェットヘッドの吐出面と、前記ノズルから膜液が吐出される基板の膜形成面とを対向させて、前記インクジェットヘッド及び前記基板を非回転状態で、この両者を前記幅方向と直交する方向に相対的に移動させながら、前記ノズルから前記基板の膜形成面に前記膜液を吐出するように構成した膜形成方法において、
前記基板が前記インクジェットヘッドに対して相対的に移動する際の態様が、その相対的な移動方向に平行な二辺と、この方向に直交する二辺とからなる矩形ではなく、
前記インクジェットヘッドのノズルの配列幅長さを、前記基板が相対的に移動する際における該基板の膜形成面の幅方向最大長さ以上にして、前記両者の相対的な移動を完了させるまでの間に、前記複数のノズルにおける膜液を吐出するノズルの個数を可変制御することを特徴とする膜形成方法。 - 膜液を吐出する複数のノズルが幅方向に配列されたインクジェットヘッドの吐出面と、前記ノズルから膜液が吐出される基板の膜形成面とを対向させて、前記インクジェットヘッド及び前記基板を非回転状態で、この両者を前記幅方向と直交する方向に相対的に移動させながら、前記ノズルから前記基板の膜形成面に前記膜液を吐出するように構成した膜形成方法において、
前記基板の膜形成面の外周端部から内周側に連なる筋状の領域では、内周側に向かって漸次膜液の吐出量が増加し、該筋状の領域から内周側に連なる領域では、その増加した膜液の最大吐出量と同一の吐出量となるように制御することを特徴とする膜形成方法。
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WO2008149652A1 (ja) * | 2007-06-06 | 2008-12-11 | Konica Minolta Opto, Inc. | 塗布装置 |
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