WO2014148286A1 - 光半導体装置の製造方法 - Google Patents
光半導体装置の製造方法 Download PDFInfo
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- WO2014148286A1 WO2014148286A1 PCT/JP2014/056101 JP2014056101W WO2014148286A1 WO 2014148286 A1 WO2014148286 A1 WO 2014148286A1 JP 2014056101 W JP2014056101 W JP 2014056101W WO 2014148286 A1 WO2014148286 A1 WO 2014148286A1
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- sealing
- sheet
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- sealing sheet
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Images
Classifications
-
- 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
- H01L33/48—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 characterised by the semiconductor body packages
- H01L33/52—Encapsulations
-
- 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
- H01L33/48—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 characterised by the semiconductor body packages
- H01L33/52—Encapsulations
- H01L33/56—Materials, e.g. epoxy or silicone resin
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
-
- 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
- H01L2933/005—Processes relating to semiconductor body packages relating to encapsulations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/02218—Material of the housings; Filling of the housings
- H01S5/02234—Resin-filled housings; the housings being made of resin
Definitions
- the present invention relates to a method for manufacturing an optical semiconductor device.
- a method of manufacturing an optical semiconductor device by sealing an optical semiconductor element with a sealing sheet is known.
- an optical semiconductor element sealing sheet including a sealing resin layer capable of sealing an optical semiconductor element is manufactured, and then the optical semiconductor element sealing sheet is mounted so as to face the optical semiconductor element mounting substrate. Then, a method of manufacturing an optical semiconductor device by pressing with a press machine has been proposed (for example, see Patent Document 1 below).
- the optical semiconductor element mounting substrate in order to manufacture the optical semiconductor element mounting substrate, first, an optical semiconductor element sealing sheet before the C stage is manufactured, and then the optical semiconductor element sealing sheet is shipped and transported. Then, after storing (storing) the optical semiconductor element sealing sheet at the shipping destination, the optical semiconductor element sealing sheet is placed in a press machine on which the optical semiconductor element mounting substrate is placed. After that, the optical semiconductor element mounted on the optical semiconductor element mounting substrate is embedded with an optical semiconductor element sealing sheet by pressing, and the optical semiconductor element sealing sheet is used as a C stage. It is sealed with a semiconductor element sealing sheet.
- An object of the present invention is to manufacture an optical semiconductor device capable of easily managing a sealing layer in a state before a C stage for sealing an optical semiconductor element, and improving the manufacturing efficiency of the optical semiconductor device. It is to provide a method.
- the optical semiconductor device manufacturing method of the present invention is an optical semiconductor device manufacturing method for manufacturing an optical semiconductor device by sealing an optical semiconductor element with a sealing layer, and manufacturing the sealing layer for manufacturing the sealing layer. And a sealing step of sealing the optical semiconductor element with the sealing layer, and manufacturing the sealing layer in the sealing layer manufacturing step, and then using the sealing layer in the sealing step.
- the time until the optical semiconductor element is sealed is 24 hours or less.
- the optical semiconductor device since the time from manufacturing the sealing layer in the sealing layer manufacturing process to sealing the optical semiconductor element with the sealing layer in the sealing process is short, the optical semiconductor device The production efficiency can be improved.
- the sealing layer before the C stage can be easily designed and managed. Therefore, the freedom degree of design and management of the sealing layer in the state before the C stage can be increased.
- the sealing layer manufactured in the sealing layer manufacturing process is transported at room temperature and supplied to the sealing process.
- the sealing layer in the state before the C stage is cooled to a low temperature in order to prevent the sealing layer from changing from the state before the C stage to the C stage. It must be (frozen) and transported and stored.
- the optical semiconductor element In the case of cooling the sealing layer, after the cooled sealing layer is returned to room temperature, the optical semiconductor element needs to be sealed with the sealing layer. When the temperature is returned to room temperature over time, condensation occurs in the sealing layer, and when the optical semiconductor element is sealed with the condensed sealing layer, voids may be generated and the reliability of the optical semiconductor device may be reduced.
- the manufacturing efficiency of the optical semiconductor device is significantly reduced.
- the above-described cooling is not required, so that it is not necessary to return the cooled sealing layer to room temperature, and the manufacturing time can be shortened. Therefore, manufacturing cost can be reduced. Furthermore, since the generation of voids due to the above-mentioned dew condensation can be prevented, a highly reliable optical semiconductor device can be manufactured.
- the optical semiconductor device manufacturing method of the present invention is an optical semiconductor device manufacturing method in which the optical semiconductor device is manufactured by sealing the optical semiconductor element with a B-stage sealing sheet, and the sealing layer
- the manufacturing process is a sheet manufacturing process for manufacturing the sealing sheet of the B stage.
- the sealing process the optical semiconductor element is sealed by the sealing sheet of the B stage, and the B stage in the sheet manufacturing process. It is preferable that the time from the manufacturing of the sealing sheet until the optical semiconductor element is sealed by the sealing sheet of the B stage in the sealing step is 24 hours or less.
- the time from the manufacture of the B-stage sealing sheet in the sheet manufacturing process to the sealing of the optical semiconductor element by the B-stage sealing sheet in the sealing process is short.
- the manufacturing efficiency of the optical semiconductor device can be improved.
- the sealing sheet of the B stage can be easily designed and managed. Therefore, the freedom degree of design and management of the B-stage sealing sheet can be increased.
- the optical semiconductor element is sealed with the B-stage sealing sheet. Therefore, the B-stage sealing sheet is superior in handleability compared to the A-stage sealing sheet.
- the optical semiconductor element can be easily sealed.
- the compression elastic modulus at 25 ° C. of the sealing sheet of the B stage manufactured in the sheet manufacturing process may be 0.040 MPa or more and 0.145 MPa or less. Is preferred.
- the degree of freedom in designing the B-stage sealing sheet can be further increased.
- the amount of increase in the compressive elastic modulus at 25 ° C. is It is suitable that it is 0.015 MPa or more and 0.120 MPa or less.
- the optical semiconductor element can be sealed also by the B-stage sealing sheet having a large increase in the compression elastic modulus at 25 ° C. when stored at 25 ° C. for 24 hours. That is, it is possible to shorten the time required for C-stage using a fast-curing B-stage sealing sheet. Therefore, the manufacturing time of the optical semiconductor device can be shortened, and as a result, the manufacturing cost can be reduced.
- the optical semiconductor device manufacturing method of the present invention is an optical semiconductor device manufacturing method for manufacturing the optical semiconductor device by sealing the optical semiconductor element with an A-stage sealing layer, and the sealing layer In the manufacturing process, the sealing layer of the A stage is manufactured. In the sealing process, the optical semiconductor element is sealed by the sealing layer of the A stage. In the sealing layer manufacturing process, the sealing of the A stage is performed. It is preferable that the time from the production of the stop layer to the sealing of the optical semiconductor element by the sealing layer of the A stage in the sealing step is 24 hours or less.
- the time from manufacturing the A-stage sealing layer in the sealing layer manufacturing process to sealing the optical semiconductor element with the A-stage sealing layer in the sealing process is short. Therefore, the manufacturing efficiency of the optical semiconductor device can be improved.
- the sealing layer of the A stage can be easily designed and managed. Therefore, the degree of freedom in designing and managing the A-stage sealing layer can be increased.
- the A-stage sealing layer is manufactured in the sealing layer manufacturing process, and the optical semiconductor element is sealed by the sealing layer in the sealing process.
- Man-hours to prepare can be reduced. Therefore, man-hours can be reduced and the manufacturing efficiency of the optical semiconductor device can be improved.
- the manufacturing efficiency of the optical semiconductor device can be improved. Moreover, the freedom degree of design and management of a sealing layer can be raised.
- FIG. 1 shows a flowchart of an LED device manufacturing method according to the first embodiment of the method of manufacturing an optical semiconductor device of the present invention.
- FIG. 2 is a schematic view of an LED device manufacturing factory in which each step shown in FIG. 1 is performed.
- 3A to 3C show each apparatus in the sheet manufacturing area where the sheet manufacturing process is performed,
- FIG. 3A is a mixing container in the varnish preparation area,
- FIG. 3B is a dispenser in the application area, and
- FIG. 3C is a B-stage. Shows the oven in the area.
- 4A to 4C show racks used in the transport process,
- FIG. 4A shows a state in which all the shelves are flipped up, and
- FIG. 4B shows that some of the shelves are lowered and the sealing sheet is FIG.
- FIG. 4C shows a state where all the shelf boards are lowered and a sealing sheet is placed.
- FIG. 5 shows a magazine used in the transport process.
- FIG. 6 shows a lidded container used in the transport process.
- FIG. 7 shows a roll used in the transport process and including a separator.
- FIG. 8 shows a roll used in the transport process and including a spacer.
- FIG. 9 shows a press used in the sealing process.
- FIG. 10 shows an LED device.
- FIG. 11 shows the relationship between the surface temperature of a sealing sheet, and the elapsed time after mounting a container with a lid on a stainless steel stand.
- FIG. 12 shows the schematic side view of the sealing sheet manufacturing unit used with the modification of the manufacturing method of the LED device of 1st Embodiment.
- FIG. 12 shows the schematic side view of the sealing sheet manufacturing unit used with the modification of the manufacturing method of the LED device of 1st Embodiment.
- FIG. 13 is a flowchart of an LED device manufacturing method according to the second embodiment of the method for manufacturing an optical semiconductor device of the present invention.
- FIG. 14 is a schematic view of an LED device manufacturing factory in which each step shown in FIG. 13 is performed.
- FIG. 15 shows a laminating apparatus used in the sealing process.
- FIG. 16 shows an LED device.
- the manufacturing method of the LED device 5 is a method of manufacturing the LED device 5 by sealing the LED 4 as the optical semiconductor element by the B-stage sealing sheet 1 as the sealing layer, as shown in FIG. is there.
- the manufacturing method of the LED device 5 includes a sheet manufacturing process (an example of a sealing layer manufacturing process) for manufacturing a B-stage sealing sheet 1 as a sealing layer, and a sealing sheet 1.
- a sealing step for sealing the LED 4 is provided.
- the manufacturing method of LED device 5 is equipped with the conveyance process which conveys the sealing sheet 1 manufactured at the sheet manufacturing process to a sealing process.
- the manufacturing method of LED4 performs a sheet
- the manufacturing method of the LED device 5 is performed in the LED device manufacturing factory 8.
- the LED device manufacturing factory 8 includes a sheet manufacturing area 9, a conveyance area 10, and a sealing area 11.
- sheet manufacturing area 9, transport area 10 and sealing area 11 are provided, for example, in the same factory site, that is, in one (same) LED device manufacturing factory 8.
- the sheet manufacturing area 9 includes a varnish preparation area 9a, a coating area 9b, and a B-staging area 9c.
- a sealing resin composition is prepared in the varnish preparation area 9a.
- the sealing resin composition contains a two-stage curable resin.
- the encapsulating resin composition is preferably made of a two-stage curable resin.
- a two-stage curable resin has a two-stage reaction mechanism, and is a curable resin that is B-staged (semi-cured) by the first-stage reaction and C-staged (completely cured) by the second-stage reaction. It is.
- the B stage is a state in which the two-stage curable resin is between the liquid A stage and the fully cured C stage, and the curing and gelation are slightly advanced, and the compression elastic modulus is the C stage. It is in a state smaller than the elastic modulus.
- the two-stage curable resin for example, a two-stage curable thermosetting resin that is cured by heating, for example, two-stage curable active energy beam curing that is cured by irradiation with active energy rays (for example, ultraviolet rays, electron beams, etc.).
- active energy rays for example, ultraviolet rays, electron beams, etc.
- a functional resin for example, a two-stage curable thermosetting resin is used.
- examples of the two-stage curable thermosetting resin include silicone resin, epoxy resin, polyimide resin, phenol resin, urea resin, melamine resin, and unsaturated polyester resin.
- a two-stage curable silicone resin is used from the viewpoint of translucency and durability.
- Examples of the two-stage curable silicone resin include a condensation reaction / addition reaction curable silicone resin having two reaction systems of a condensation reaction and an addition reaction.
- condensation reaction / addition reaction curable silicone resin examples include a first condensation reaction containing a silanol-terminated polysiloxane, an alkenyl group-containing trialkoxysilane, an organohydrogenpolysiloxane, a condensation catalyst, and a hydrosilylation catalyst.
- Addition reaction curable silicone resin for example, silanol group-terminated polysiloxane (see formula (1) described later), ethylenically unsaturated hydrocarbon group-containing silicon compound (see formula (2) described later), ethylenically unsaturated Second condensation reaction / addition reaction curable silicone resin containing a hydrocarbon group-containing silicon compound (see formula (3) described later), organohydrogenpolysiloxane, condensation catalyst and hydrosilylation catalyst, for example, both-end silanol type Silicone oil, alkenyl group-containing dialkoxya
- a third condensation reaction / addition reaction curable silicone resin containing a kill silane, an organohydrogenpolysiloxane, a condensation catalyst and a hydrosilylation catalyst for example, an organopolysiloxane having at least two alkenylsilyl groups in one molecule; Fourth polycondensation / addition reaction curable silicone resin containing an organopolysiloxane having at least two hydrosilyl groups in
- the condensation reaction / addition reaction curable silicone resin is preferably a second condensation reaction / addition reaction curable silicone resin, and specifically described in detail in JP 2010-265436 A, for example.
- the second condensation reaction / addition reaction curable silicone resin is, for example, an ethylenically unsaturated hydrocarbon group-containing silicon compound and an ethylenically unsaturated hydrocarbon group-containing silicon compound, which are condensation materials, It is prepared by adding a condensation catalyst all at once, then adding an organohydrogenpolysiloxane as an addition raw material, and then adding a hydrosilylation catalyst (addition catalyst).
- the content ratio of the condensation catalyst is, for example, 1 ⁇ 10 ⁇ 5 parts by mass or more, preferably 1 ⁇ 10 ⁇ 4 parts by mass or more, for example, 50 parts by mass or less, with respect to 100 parts by mass of the condensation raw material. Preferably, it is 10 parts by mass or less.
- a desired compression elastic modulus M0 (described later) at 25 ° C. of the sealing sheet 1 (see FIG. 3C) manufactured in the sheet manufacturing process is set from a wide range. be able to.
- the blending ratio of the two-stage curable resin is, for example, 30% by mass or more, preferably 40% by mass or more, more preferably 50% by mass or more with respect to the sealing resin composition. It is 95 mass% or less, Preferably, it is 95 mass% or less, More preferably, it is 90 mass% or less.
- the sealing resin composition may contain a phosphor and / or a filler as necessary.
- the phosphor has a wavelength conversion function, and examples thereof include a yellow phosphor capable of converting blue light into yellow light, and a red phosphor capable of converting blue light into red light.
- yellow phosphor examples include silicate phosphors such as (Ba, Sr, Ca) 2 SiO 4 ; Eu, (Sr, Ba) 2 SiO 4 : Eu (barium orthosilicate (BOS)), for example, Y 3 Al Garnet-type phosphors having a garnet-type crystal structure such as 5 O 12 : Ce (YAG (yttrium, aluminum, garnet): Ce), Tb 3 Al 3 O 12 : Ce (TAG (terbium, aluminum, garnet): Ce) Examples thereof include oxynitride phosphors such as Ca- ⁇ -SiAlON.
- silicate phosphors such as (Ba, Sr, Ca) 2 SiO 4 ; Eu, (Sr, Ba) 2 SiO 4 : Eu (barium orthosilicate (BOS)
- Y 3 Al Garnet-type phosphors having a garnet-type crystal structure such as 5 O 12 : Ce (YAG (yttrium, aluminum, garnet): Ce
- red phosphor examples include nitride phosphors such as CaAlSiN 3 : Eu and CaSiN 2 : Eu.
- Examples of the shape of the phosphor include a spherical shape, a plate shape, and a needle shape.
- spherical shape is mentioned from a fluid viewpoint.
- the average value of the maximum length of the phosphor (in the case of a sphere, the average particle diameter) is, for example, 0.1 ⁇ m or more, preferably 1 ⁇ m or more, and for example, 200 ⁇ m or less, preferably 100 ⁇ m or less. But there is.
- Fluorescent substances can be used alone or in combination.
- the blending ratio of the phosphor is, for example, 0.1 parts by mass or more, preferably 0.5 parts by mass or more, for example, 80 parts by mass or less, preferably 100 parts by mass of the two-stage curable resin. It is also 50 parts by mass or less.
- the filler is blended in the sealing resin composition in order to improve the toughness of the sealing sheet 1 (see FIG. 3C), for example, organic fine particles such as silicone particles (specifically, including silicone rubber particles), Examples thereof include inorganic fine particles such as silica (for example, fumed silica), talc, alumina, aluminum nitride, and silicon nitride.
- organic fine particles such as silicone particles (specifically, including silicone rubber particles)
- examples thereof include inorganic fine particles such as silica (for example, fumed silica), talc, alumina, aluminum nitride, and silicon nitride.
- the average value of the maximum length of the filler is, for example, 0.1 ⁇ m or more, preferably 1 ⁇ m or more, and, for example, 200 ⁇ m or less, preferably It is also 100 ⁇ m or less.
- the filler can be used alone or in combination.
- the blending ratio of the filler is, for example, 0.1 parts by mass or more, preferably 0.5 parts by mass or more, and, for example, 70 parts by mass or less, preferably 100 parts by mass of the two-stage curable resin. Is 50 parts by mass or less.
- a two-stage curable resin and a phosphor and / or a filler that are blended as necessary are blended and mixed.
- a solvent can be blended at an appropriate ratio.
- the solvent include aliphatic hydrocarbons such as hexane, aromatic hydrocarbons such as xylene, and siloxanes such as vinylmethyl cyclic siloxane and both-end vinyl polydimethylsiloxane.
- the above-described components are blended in the mixing container 52 including the stirrer 51, and then, They are mixed using a stirrer 51.
- the A-stage sealing resin composition is prepared as a varnish.
- the viscosity of the varnish at 25 ° C. and 1 atm is, for example, 1,000 mPa ⁇ s or more, preferably 4,000 mPa ⁇ s or more, and, for example, 1,000,000 mPa ⁇ s or less, preferably , 100,000 mPa ⁇ s or less.
- the viscosity is measured at a rotational speed of 99 s -1 by adjusting the temperature of the varnish to 25 ° C. and using an E-type cone. The following viscosities are measured by the same method as described above.
- an A-stage sealing resin composition (varnish) is applied in the application area 9b shown in FIG.
- varnish is applied to the surface of the release sheet 2.
- the release sheet 2 examples include polymer films such as polyethylene film and polyester film (PET), for example, ceramic sheets, for example, metal foil. Preferably, a polymer film is used. Further, the surface of the release sheet 2 can be subjected to a peeling treatment such as a fluorine treatment. Moreover, the shape of the release sheet 2 is not particularly limited, and is formed in, for example, a substantially rectangular shape in plan view (including a strip shape and a long shape).
- an application device such as a dispenser, an applicator, or a slit die coater is used.
- a dispenser 13 shown in FIG. 3B is used.
- the varnish is separated so that the thickness of the sealing sheet 1 is, for example, 10 ⁇ m or more, preferably 50 ⁇ m or more, and, for example, 2000 ⁇ m or less, preferably 1000 ⁇ m or less. Apply to the mold sheet 2.
- the varnish is applied in an appropriate shape such as a substantially rectangular shape (including a strip shape and a long shape), for example, a circular shape in a plan view.
- the varnish which comprises the above-mentioned shape may be formed at intervals.
- the varnish is applied to, for example, a release sheet 2 having a substantially rectangular shape in plan view (excluding a long shape), and a single-stage encapsulating sheet 1 is obtained by forming a B-stage described below, or The continuous encapsulating sheet 1 can also be formed by applying continuously to the long release sheet 2 and forming a B-stage described below.
- varnish is apply
- the sealing sheet 1 is made into a single-wafer
- the applied varnish is heated.
- an oven 55 including a heater 54 disposed on the upper side and / or the lower side of the release sheet 2 is used.
- the heating temperature is, for example, 40 ° C. or higher, preferably 80 ° C. or higher, more preferably 100 ° C. or higher, and for example, 200 ° C. or lower, preferably 150 ° C. or lower, more preferably, 140 ° C. or lower.
- the heating time is, for example, 1 minute or more, preferably 5 minutes or more, more preferably 10 minutes or more, and for example, 24 hours or less, preferably 1 hour or less, more preferably 0.5 hours. It is as follows.
- the desired compression elastic modulus M0 (described later) at 25 ° C. of the sealing sheet 1 manufactured in the sheet manufacturing process can be set from a wide range by selecting the heating conditions from the above range.
- the varnish when the varnish contains a two-stage curable active energy ray-curable resin, the varnish is irradiated with active energy rays.
- the varnish is B-staged (semi-cured), but not C-staged (completely cured), that is, the sealing sheet 1 before C-staged (completely cured), that is, the B-staged sealing sheet. 1 is formed.
- the C stage is a state where the degree of cure is 90% or more.
- the degree of cure is, for example, a state in which the increase in compression elastic modulus is saturated by heating or irradiation with active energy rays, and the degree of cure is 100%, and then the ratio of the compression elastic modulus (of the measurement sample with respect to the saturated compression elastic modulus). Compressive modulus ratio).
- the B-stage sealing sheet 1 laminated on the surface of the release sheet 2 is manufactured.
- the compression elastic modulus M0 at 25 ° C. of the encapsulating sheet 1 manufactured in this sheet manufacturing process is, for example, 0.040 MPa or more, preferably 0.050 MPa or more, more preferably 0.075 MPa or more, and still more preferably, For example, it is 0.145 MPa or less, preferably 0.140 MPa or less, more preferably 0.135 MPa or less, and further preferably 0.125 MPa or less.
- the compression elastic modulus M0 exceeds the above upper limit
- a desired compression elastic modulus for example, the B-stage sealing sheet 1 is manufactured in a sheet manufacturing process described later.
- the upper limit of the compression elastic modulus M2) of the sealing sheet 1 when the LED 4 is sealed by the sealing sheet 1 in the sealing step may be exceeded. In that case, if the LED 4 is connected to the substrate 6 by wire bonding (see the broken line in FIG. 9), the wire 7 may be deformed.
- the compression modulus M0 is less than the lower limit described above, it is difficult to ensure the shape of the sealing sheet 1. That is, the varnish may not form the shape of the sealing sheet 1.
- a two-stage curable resin is subjected to a condensation reaction / addition.
- the content ratio of the condensation catalyst is, for example, 1 ⁇ 10 ⁇ 5 parts by mass or more, preferably 1 ⁇ 10 ⁇ 4 parts by mass or more, or the heating temperature is, for example, 80 ° C. or more, further 100 ° C. or more, and for example, 180 ° C.
- the heating time is, for example, 60 minutes or less, preferably 40 minutes or less, more preferably 30 minutes or less, It is set to be equal to or greater than minutes.
- a two-stage curable resin is a condensation reaction / addition reaction.
- the content ratio of the condensation catalyst is, for example, 1 ⁇ with respect to 100 parts by mass of the condensation raw material. 10 ⁇ 5 parts by mass or more, preferably 1 ⁇ 10 ⁇ 4 parts by mass or more, or the heating temperature is, for example, 80 ° C. or more, further 100 ° C. or more, and for example, 180 ° C. or less.
- the heating time is, for example, 90 minutes or less, preferably 60 minutes or less, more preferably 45 minutes or less, and for example, 7. It is set to be equal to or greater than minutes.
- the increase ⁇ M in compression modulus at 25 ° C. is, for example, 0 MPa or more, for example, 0.015 MPa or more, For example, it is 0.120 MPa or less.
- increase amount (DELTA) M is 24 at 25 degreeC in the sealing sheet 1 manufactured at the sheet manufacturing process from the compression elastic modulus M2 after preserve
- the increase amount ⁇ M is less than the lower limit described above, the state change of the sealing sheet 1 from the B stage to the C stage becomes excessively slow. Therefore, the time for forming the sealing sheet 1 into the C stage may be excessively long. As a result, the manufacturing efficiency of the LED device 5 (see FIG. 10) may decrease.
- the sealing sheet 1 changes from the B stage to the C stage after the sealing sheet 1 is manufactured in the sheet manufacturing process until the LED 4 is sealed by the sealing sheet 1 in the sealing process.
- the wire 7 may be deformed or the LED 4 may not be reliably sealed by the sealing sheet 1.
- the amount of increase ⁇ M in the compression modulus at 25 ° C. when stored at 25 ° C. for 24 hours is, for example, 0.050 MPa or more (further, 0.075 MPa or more, further 0.100 MPa or more),
- the sealing sheet 1 manufactured in the sheet manufacturing process so as to be 0.120 MPa or less is a short-time curable (that is, fast curable) sealing sheet having a relatively short C-stage time. It is set to 1.
- a two-stage curable resin is a condensation reaction / addition reaction curable silicone resin (specifically, first to third condensation reactions / addition reaction curing).
- the content of the hydrosilylation catalyst is, for example, 5.6 ⁇ 10 ⁇ 3 parts by mass or more, preferably 0.01 parts by mass or more with respect to 100 parts by mass of the additional raw material. .
- the encapsulating sheet 1 is a long-time curable (or slowly curable) encapsulating sheet 1 having a relatively slow C-stage time.
- a two-stage curable resin is a condensation reaction / addition reaction curable silicone resin (specifically, first to third condensation reaction / addition reaction curing).
- Type silicone resin the content of the hydrosilylation catalyst is, for example, 1 ⁇ 10 ⁇ 3 parts by mass or more, preferably 5 ⁇ 10 ⁇ 4 parts by mass or more with respect to 100 parts by mass of the additional raw material. .
- the continuous B-stage sealing sheet 1 is cut into a predetermined shape together with the continuous release sheet 2 if necessary.
- the transport process is performed in the transport area 10 as shown in FIG.
- the conveyance area 10 is provided between the sheet manufacturing area 9 and the sealing area 11.
- the sealing sheet 1 manufactured in the sheet manufacturing process is transported at room temperature and supplied to the sealing area 11 where the sealing process is performed. Or the sealing sheet 1 is conveyed at the low temperature below room temperature.
- the room temperature is a temperature that is not maintained at a low temperature in order to actively cool the sealing sheet 1 with a special cooling facility such as a freezer or a refrigerator.
- a moderately cooled temperature for conditioning specifically, for example, 10 ° C. or higher, further 20 ° C. or higher, further 23 ° C. or higher, and for example, 40 ° C. or lower, 30 degrees C or less, Furthermore, it is 25 degrees C or less.
- the low temperature below room temperature is a temperature maintained at a low temperature in order to cool the sealing sheet 1 by a special cooling facility, specifically, for example, below 10 ° C., further below 5 ° C., and -60 ° C. or higher.
- the sealing sheet 1 manufactured in the sheet manufacturing process is conveyed at room temperature. If the sealing sheet 1 is transported at room temperature, the cooling equipment for cooling described above becomes unnecessary, and therefore the manufacturing equipment of the LED device 5 can be simplified, and as a result, the manufacturing cost of the LED device 5 is reduced. can do.
- the sealing sheet 1 In order to convey the sealing sheet 1, when the sealing sheet 1 is manufactured in a single wafer type, for example, the rack 15 shown in FIGS. 4A to 4C, for example, the magazine 16 shown in FIG. It accommodates in conveyance containers, such as the container 17 with a lid
- conveyance containers such as the container 17 with a lid
- the press machine 20 (after-mentioned, refer FIG. 9) in a sealing process.
- the release sheet 2 is formed in an elongated shape, and the surface of the sealing sheet 1 (contact surface with respect to the release sheet 2).
- Separator 18 is laminated on the opposite side), release sheet 2, sealing sheet 1 and separator 18 are wound to form roll 22, and sealing sheet 1 is rolled into press machine 20 (described later, see FIG. 9). 22 can also be conveyed.
- the sealing sheet 1 is manufactured by a continuous type, as shown in FIG. 8, in the long release sheet 2, the width direction with respect to the sealing sheet 1 (perpendicular to the longitudinal direction and the thickness direction).
- the long spacers 12 are provided on both outer sides, and then the release sheet 2, the sealing sheet 1, and the spacer 12 are arranged so that the surface of the sealing sheet 1 does not contact the back surface of the release sheet 2.
- the sealing sheet 1 can also be conveyed as a roll 22 to a press machine 20 (described later, see FIG. 9).
- the sealing sheet 1 is supplied continuously to the conveyor 14 shown by an imaginary line in FIG. 2 in order to supply the sealing sheet 1 to the sealing area 11. It can also be conveyed to the sealing area 11.
- the lidded container 17 shown is used. That is, the conveyance container which conveys the single-wafer
- the rack 15 includes a frame 30 that is substantially L-shaped in side view, a plurality of shelf plates 31 that are rotatably attached to the frame 30 in the vertical direction, and casters that are attached to the frame 30. 32.
- the frame 30 is integrally provided with a bottom frame 33 formed in a substantially rectangular frame shape in plan view and a back frame 34 extending upward from the rear end portion of the bottom frame 33.
- a plurality of shelf boards 31 are provided at intervals in the vertical direction.
- the shelf board 31 has a net-shelf shape, and a rear end portion of the shelf board 31 is rotatably supported by the back frame 34 so as to be flipped up.
- a holding piece 35 that protrudes downward is provided at the front end portion of the shelf board 31.
- the shelf board 31 is configured such that when the front end portion of the shelf board 31 is lowered, the holding piece 35 is placed on the shelf. It is comprised so that the horizontal attitude
- FIG. 4A the shelf board 31 is flipped up and disposed in an inclined manner when the sealing sheet 1 is not placed.
- FIG. 4B and FIG. 4C when the sealing sheet 1 is placed, the shelf boards 31 adjacent to each other in the vertical direction do not come into contact with each other. An accommodation space is formed between them. Moreover, each shelf board 31 is maintained in a horizontal posture.
- a plurality of casters 32 are provided on the lower surface of the bottom frame 33.
- the front end portion of the flipped up shelf 31 (for example, the shelf 31 located at the bottom) shown in FIG. 4A is indicated by an arrow in FIG. 4B.
- the sealing sheet 1 is placed on the shelf 31 as shown in FIG. Specifically, it arrange
- a shelf 31 arranged adjacent to the upper side of the lowest shelf 31 on which the sealing sheet 1 is placed is provided. Horizontally, the sealing sheet 1 is placed on the shelf board 31. This operation is repeated. Thereby, as shown in FIG. 4C, the sealing sheet 1 is placed on each of all the shelf boards 31. As a result, the plurality of sealing sheets 1 are accommodated in the rack 15.
- Such a rack 15 is versatile, and further, when the sealing sheet 1 is not accommodated, the rack 15 can be stored in a compact manner, so that space can be saved.
- the magazine 16 shown in FIG. 5 is a rack provided with a substantially box-shaped case 36 whose front is opened, and a mounting plate 37 provided in the case 36.
- the mounting plate 37 is a support plate on which the peripheral end portion of the sealing sheet 1 (release sheet 2) is mounted.
- a plurality of mounting plates 37 are attached in an aligned manner in the case 36 so as to be spaced apart from each other in the vertical direction.
- Each mounting plate 37 has a substantially flat plate shape as indicated by a virtual line, or a substantially U shape in plan view with a front opening as indicated by a solid line (solid line, however, the U shape is shown in FIG. 5). Is not formed).
- the release sheet 2 is placed on the upper surface of the placement plate 37.
- the lidded container 17 shown in FIG. 6 includes a tray 40 and a cover (upper lid) 41.
- the tray 40 is formed in a thin plate shape from a resin such as PET, and integrally includes a tray flange portion 42, a tray flat plate portion 43, and a tray frame portion 44.
- the tray flange 42 is formed in a substantially frame shape in plan view at the peripheral portion of the tray 40.
- the tray flat plate portion 43 forms an inner portion of the tray 40 and is formed in a flat plate shape that is disposed on the inner side of the tray 40 from the inner peripheral edge of the tray flange portion 42.
- the tray frame portion 44 is formed to connect the inner peripheral edge of the tray frame portion 44 and the outer peripheral edge of the tray flat plate portion 43 and protrude upward.
- the cover 41 is integrally provided with a cover flange 45 and a cover flat plate portion 46.
- the cover collar 45 is formed in a substantially frame shape in plan view at the peripheral portion of the cover 41.
- the cover flange 45 is formed with a fitting groove 47 that is fitted to the upper end portion of the tray frame portion 44 when the tray 40 and the cover 41 are stacked in the vertical direction.
- the cover flat plate portion 46 has a substantially U-shaped cross-sectional view that opens downward, and is formed in a flat plate shape that is disposed inside the cover flange 45.
- the cover flat plate portion 46 is formed so as to protrude above the cover flange portion 45.
- the tray 40 is prepared, and then the release sheet 2 on which the sealing sheet 1 is laminated is placed on the tray flat plate portion 43 of the tray 40. Thereafter, the cover 41 is overlaid on the tray 40 so that the upper end portion of the tray frame portion 44 is fitted in the fitting groove 47. As a result, a storage space is defined between the tray flat plate portion 43 and the cover flat plate portion 46.
- the sealing sheet 1 is accommodated in the accommodating space in the lidded container 17 at a distance from the cover flat plate portion 46 of the cover 41.
- the lidded container 17 containing the sealing sheet 1 can be further accommodated in a storage bag (pouch) made of a metal such as aluminum or a resin such as polypropylene or polyethylene.
- a storage bag made of a metal such as aluminum or a resin such as polypropylene or polyethylene.
- an aluminum pouch is used from the viewpoint of water vapor barrier properties.
- the sealing sheet 1 can be prevented from coming into contact with other members.
- the sealing step is performed in the sealing area 11.
- the sealing area 11 includes an LED preparation area 11a, an installation / press area 11b, and a C-staging area 11c.
- the substrate 6 on which the LED 4 is mounted as shown in FIG. 9 is prepared.
- the substrate 6 is made of an insulating substrate such as a silicon substrate, a ceramic substrate, a polyimide resin substrate, or a laminated substrate in which an insulating layer is laminated on a metal substrate.
- an insulating substrate such as a silicon substrate, a ceramic substrate, a polyimide resin substrate, or a laminated substrate in which an insulating layer is laminated on a metal substrate.
- a conductive pattern (not shown) provided on the surface of the substrate 6 is provided with electrodes (not shown) for electrical connection with terminals (not shown) of LEDs 4 to be described below, and wiring continuous therewith. ) Is formed.
- the conductor pattern is formed from a conductor such as gold, copper, silver, or nickel.
- the LED 4 is an optical semiconductor element that converts electrical energy into light energy, and is formed, for example, in a substantially rectangular shape in cross-sectional view whose thickness is shorter than the length in the plane direction (length in the direction perpendicular to the thickness direction).
- Examples of the LED 4 include a blue LED (light emitting diode element) that emits blue light.
- the thickness of the LED 4 is, for example, 10 to 1000 ⁇ m.
- the LED 4 is mounted on the substrate 6 by wire bonding connection or flip chip mounting, for example.
- the LED 4 is mounted on the substrate 6, and the terminals of the LED 4 are connected by wire bonding using the electrodes of the substrate 6 and the wires 7.
- terminals of the LED 4 are wire-bonded to the electrodes of the substrate 6, terminals (not shown) are formed on the surface of the LED 4, and the terminals are arranged on the surface of the substrate 6 in the horizontal direction. Are electrically connected to an electrode (not shown) provided at a distance through the wire 7.
- the wire 7 is formed in a linear shape, and one end thereof is electrically connected to the terminal of the LED 4 and the other end is electrically connected to an electrode (not shown) of the substrate 6.
- Examples of the material of the wire 7 include metal materials used as LED wire bonding materials such as gold, silver, and copper, and gold is preferable from the viewpoint of corrosion resistance.
- the wire diameter (thickness) of the wire 7 is, for example, 10 ⁇ m or more, preferably 20 ⁇ m or more, and for example, 100 ⁇ m or less, preferably 50 ⁇ m or less.
- the wire 7 is bent or bent in a state where the terminal of the LED 4 and the electrode of the substrate 6 are connected, and is formed in a substantially arc shape (for example, a triangular arc shape, a square arc shape, an arc shape, etc.). ing.
- a substantially arc shape for example, a triangular arc shape, a square arc shape, an arc shape, etc.
- the substrate 6 on which the LEDs 4 are mounted is installed in the press machine 20 shown in FIG.
- the press machine 20 is arranged continuously (over) the installation / press area 11b and the C-staging area 11c.
- a flat plate press machine including two flat plates 21 that are opposed to each other with an interval in the vertical direction is adopted.
- the two flat plates 21 are configured to be movable in both the installation / press area 11b and the C-staging area 11c.
- the substrate 6 on which the LEDs 4 are mounted is installed on the lower flat plate 21.
- the sealing sheet 1 supplied from the conveyance area 10 shown in FIG. 2 is turned upside down so as to face the LED 4. That is, the sealing sheet 1 is disposed so as to face the LED 4.
- the LED 4 is embedded by the sealing sheet 1.
- the sealing sheet 1 is lowered (pressed down). Specifically, the sealing sheet 1 is pressed against the substrate 6 on which the LEDs 4 are mounted. Specifically, the upper flat plate 21 is brought close to the lower flat plate 21.
- the press pressure is, for example, 0.05 MPa or more, preferably 0.1 MPa or more, and for example, 1 MPa or less, preferably 0.5 MPa or less.
- the LED 4 and the wire 7 are covered with the sealing sheet 1. That is, the LED 4 and the wire 7 are embedded in the sealing sheet 1.
- the encapsulating sheet 1 is converted to the C stage in the C staging area 11c of FIG.
- An oven is provided in the C-staging area 11c.
- the sealing sheet 1 is heated. Specifically, the flat plate 21 is moved to the C-staging area 11c while being kept pressed against the sealing sheet 1 by the flat plate 21, and put into the oven. Thereby, the sealing sheet 1 is heated.
- the heating temperature is, for example, 80 ° C. or more, preferably 100 ° C. or more, and for example, 200 ° C. or less, preferably 180 ° C. or less.
- the heating time is, for example, 10 minutes or more, preferably 30 minutes or more, and for example, 10 hours or less, preferably 5 hours or less.
- the encapsulating sheet 1 is C-staged (completely cured) by heating the encapsulating sheet 1.
- the encapsulating sheet 1 is irradiated by irradiating the encapsulating sheet 1 with active energy rays in the C-staging area 11c. C-stage (complete curing). Specifically, the sealing sheet 1 is irradiated with ultraviolet rays using an ultraviolet lamp or the like.
- sealing is performed after manufacturing the sealing sheet 1 in the sheet manufacturing process of the sheet manufacturing area 9 (B-staging area 9c) (specifically, from the time when the varnish is converted to the B-stage).
- the time T until the LED 4 is sealed with the sealing sheet 1 (specifically, until the LED 4 is embedded with the sealing sheet 1) in the sealing step of the area 11 (installation / press area 11b) is 24 hours. Or less, preferably 18 hours or less, more preferably 12 hours or less, further preferably 6 hours or less, particularly preferably 3 hours or less, and for example, 1 second or more, preferably 1 minute or more. is there.
- the LED device 5 as an optical semiconductor device including the sealing sheet 1, the LED 4 sealed by the sealing sheet 1, and the substrate 6 on which the LED 4 is mounted is manufactured.
- the release sheet 2 is peeled off from the sealing sheet 1 as shown by the phantom lines in FIG.
- the sealing sheet 1 seals the plurality of LEDs 4, although not shown, the sealing sheet 1 is then cut into pieces corresponding to each LED 4 if necessary.
- the sealing sheet 1 is manufactured and shipped in a sheet manufacturing factory, and then in a sealing factory (specifically, an LED device manufacturing factory) in a different place from the sheet manufacturing factory.
- the LED 4 is sealed by the sealing sheet 1.
- this method includes a sheet manufacturing area 9, a conveyance area 10, and a sealing area 11 in one (same) factory, specifically, an LED device manufacturing factory 8, Each process described above is performed in each area.
- the sheet manufacturing factory is provided in the LED device manufacturing factory, and the sheet manufacturing process and the sealing process are performed in the same factory.
- the state before the C stage of the sealing sheet 1, specifically, it is not necessary to maintain the B stage of the sealing sheet 1 for a long time. Can be designed and managed. Therefore, the freedom degree of design and management of the B-stage sealing sheet 1 can be increased.
- the sealing sheet 1 since it takes a long time to transport and store the sealing sheet 1, the sealing sheet 1 is prevented from being in a state before the C stage, specifically, from the B stage to the C stage. In addition, it is necessary to cool (freeze) the B-stage sealing sheet 1 to a low temperature and transport and store it.
- the sealing sheet 1 of the B stage manufactured in the sheet manufacturing process is removed. It can be conveyed at room temperature and supplied to the sealing process. Therefore, the above-described man-hours and equipment for cooling are unnecessary, and as a result, the manufacturing cost of the LED device 5 can be reduced.
- the sealing sheet 1 of the B stage in the sealing step since the LED 4 is sealed by the sealing sheet 1 of the B stage in the sealing step, the B stage is superior in handling properties compared to the liquid A stage sealing layer 61 (described later). The LED 4 can be easily sealed by the sealing sheet 1.
- the compression elastic modulus in 25 degreeC of the sealing sheet 1 manufactured at the sheet manufacturing process is 0.040 Mpa or more and 0.145 Mpa or less, since the range of the compression elastic modulus of the sealing sheet 1 which can be used is wide. Moreover, the freedom degree of design of the sealing sheet 1 can be raised further.
- the LED 4 can be sealed also by the sealing sheet 1 having a large increase in compression elastic modulus ⁇ M at 25 ° C. when stored at 25 ° C. for 24 hours. That is, the time required for C-stage can be shortened by using the fast-curing sealing sheet 1. Therefore, the manufacturing time of the LED device 5 can be shortened, and as a result, the manufacturing cost can be reduced.
- the upper flat plate 21 is brought close to the lower flat plate 21.
- the lower flat plate 21 21 can be brought close to the upper flat plate 21. That is, the substrate 6 that is disposed on the lower flat plate 21 and on which the LEDs 4 are mounted is pressed toward the sealing sheet 1.
- the substrate 6 on which the LEDs 4 are mounted is disposed on the lower flat plate 21, and the release sheet 2 on which the sealing sheet 1 is laminated is disposed on the upper flat plate 21.
- the substrate 6 on which the LEDs 4 are mounted can be disposed on the upper flat plate 21, and the release sheet 2 on which the sealing sheet 1 is laminated can be disposed on the lower flat plate 21.
- the C-staging area 11 c including an oven is provided in the sealing area 11.
- the C-staging area 11 c is provided in the sealing area 11.
- the sealing area 11 can also be configured without this. In that case, for example, a heater is provided on the flat plate 21 shown in FIG. 9, and the sealing sheet 1 of the B stage is heated by this heater, whereby the sealing sheet 1 is made into a C stage.
- the conveyance area 10 is provided between the sheet manufacturing area 9 and the sealing area 11, it is not limited to this, In particular, without providing the conveyance area 10, The LED device manufacturing factory 8 can also be configured.
- the LED 4 and the LED device 5 are described as examples as the optical semiconductor element and the optical semiconductor device in the present invention, respectively.
- an LD (laser diode) 4 and a laser diode respectively. It can also be the device 5.
- the sheet manufacturing area 9 is provided in advance in the LED device manufacturing factory 8.
- a movable sealing sheet manufacturing unit 91 is provided in the LED device manufacturing factory 8. It can also be installed.
- the sealing sheet manufacturing unit 91 includes a container 92 and a sheet manufacturing apparatus 93 accommodated in the container 92.
- the container 92 includes a housing 94, a first wheel 95 as a traveling device, a first connecting member 96, and a landing gear 97.
- the sheet manufacturing apparatus 93 is accommodated in the housing 94.
- the sheet manufacturing apparatus 93 includes a varnish preparation apparatus 98 and a sheet preparation apparatus 99.
- the varnish preparation device 98 includes, for example, a mixing container 52 and a stirrer 51.
- the sheet preparation device 99 is disposed adjacent to the varnish preparation device 98.
- the sheet preparation device 99 includes, for example, a coating device 13 and a heating device 118.
- Examples of the coating device 13 include a dispenser.
- the heating device 118 may be a hot plate.
- Each member (the varnish preparation device 98 and the sheet preparation device 99) provided in the above-described sheet manufacturing apparatus 93 is fixed to the housing 94.
- sealing sheet 1 is manufactured using the sealing sheet manufacturing unit 91, and then the LED 4 is sealed by the sealing sheet 1 to manufacture the LED device 5. A method will be described.
- the sealing sheet manufacturing unit 91 is moved.
- the LED device manufacturing factory 8 specifically, the installation location of the container 92 in the vicinity of the LED device manufacturing building (not shown)).
- the sealing sheet manufacturing unit 91 and the trailer 150 are connected.
- the trailer 150 includes a chassis 148, a cab 149, an engine 151 accommodated in the cab 149, a second wheel 152 configured to be rotatable with respect to an axle provided in the chassis 148, and a second connecting member 153. Prepare.
- the rear portion of the chassis 148 is inserted into the lower portion of the container 92, and the second connecting member 153 and the first connecting member 96 are connected. They are arranged facing each other in the vertical direction, and they are connected.
- the container 92 is pulled based on the driving force of the engine 151 of the trailer 150.
- the container 92 travels with the trailer 150 by the rotation of the first wheel 95.
- the trailer 150 and the sealing sheet manufacturing unit 91 are moved to the LED device manufacturing factory 8 or to a predetermined installation location.
- the landing gear 97 is advanced downward, and the lower end portion of the landing gear 97 is grounded.
- the connection between the second connecting member 153 and the first connecting member 96 is released, and the rear portion of the cab 149 is detached from the lower portion of the container 92.
- the trailer 150 is separated from the container 92.
- the sheet manufacturing apparatus 93 is operated in the container 92 to manufacture the sealing sheet 1. Specifically, the varnish is applied to the surface of the release sheet 2, and when the varnish contains a two-stage curable thermosetting resin, the varnish is heated by heating the varnish with a heating device 118. Stage (semi-curing) is performed to obtain the sealing sheet 1.
- LED4 is sealed with the obtained sealing sheet 1, and the LED device 5 is manufactured.
- the B-stage sealing sheet 1 manufactured by the sealing sheet manufacturing unit 91 is set in a press machine 20 (see FIG. 9) installed in a building (not shown) of the LED device manufacturing factory. To do.
- a substrate 6 on which the LEDs 4 are mounted is prepared, and the substrate 6 is set in the above-described hot press apparatus.
- the sealing sheet 1 (FIG. 12) laminated on the upper surface of the release sheet 2 is turned upside down so as to face the LED 4. That is, the sealing sheet 1 is disposed so as to face the LED 4.
- the sealing sheet 1, the LED 4, and the substrate 6 are arranged in a press machine 20 installed in the building of the LED device manufacturing factory.
- the LED device 5 including the sealing sheet 1, the LED 4 sealed by the sealing sheet 1, and the substrate 6 on which the LED 4 is mounted is manufactured.
- the sealing sheet manufacturing unit 91 is manufactured as another LED device.
- the sealing sheet manufacturing unit 91 is moved to the inside of the factory or the installation location, specifically, to the next LED device manufacturing factory or installation location installed in an area separated from the first LED device manufacturing factory 8. Then, the trailer 150 and the sealing sheet manufacturing unit 91 are moved from the first LED device manufacturing factory 8 or the installation location to the next LED device manufacturing factory or the installation location.
- the sheet manufacturing apparatus 93 together with the container 92 and the LED device manufacturing factory that seals the LED 4 to be sealed by the B-stage sealing sheet 1 or LED device manufacturing. It can be moved to the installation location of the container 92 in the vicinity of the factory. Therefore, the B-stage sealing sheet 1 can be manufactured in the LED device manufacturing factory 8 or at an installation location. Therefore, the manufactured B-stage sealing sheet 1 can be transported as it is in a short time to the press machine 20 installed in the building (not shown) of the LED device manufacturing factory 8. As a result, the conveyance time for conveying the sealing sheet 1 after manufacture can be significantly shortened.
- the sealing sheet 1 is manufactured in the LED device manufacturing factory 8 or at the installation location, and then the LED 4 can be sealed with the B-stage sealing sheet 1 in the LED device manufacturing factory 8, the B stage The LED 4 can be reliably sealed by the sealing sheet 1. Therefore, since the above-described cooling equipment is not required, the manufacturing cost can be suppressed.
- a B-stage sealing sheet 1 is manufactured as a sealing layer, and then the optical semiconductor element 3 is sealed with the B-stage sealing sheet 1.
- the A-stage sealing layer 61 is also possible to manufacture the A-stage sealing layer 61 as the sealing layer and then seal the optical semiconductor element 3 with the A-stage sealing layer 61.
- the manufacturing method of the LED device 5 of the second embodiment is a method of manufacturing the LED device 5 by sealing the LED 4 with the sealing layer 61 of the A stage as shown in FIGS. 15 and 16.
- the manufacturing method of the LED device 5 includes a sealing layer manufacturing process for manufacturing the A-stage sealing layer 61 and a sealing process for sealing the LED 4 with the A-stage sealing layer 61.
- the manufacturing method of LED device 5 is equipped with the conveyance process which conveys the sealing layer 61 of A stage manufactured at the sealing layer manufacturing process to a sealing process.
- the manufacturing method of LED4 implements a sealing layer manufacturing process, a conveyance process, and a sealing process one by one.
- the sealing layer manufacturing area 59 does not include the B-staging area 9c (see FIG. 2), but includes a varnish preparation area 9a and a coating area 9b.
- the sealing resin composition is prepared in the varnish preparation area 9a.
- the sealing resin composition contains a one-step curable resin.
- the sealing resin composition is preferably made of a one-step curable resin.
- the one-step curable resin has a one-step reaction mechanism and is a curable resin that is completely cured by the first-step reaction.
- a one-step curable resin for example, a one-step curable thermosetting resin that is cured by heating, for example, one-step curable active energy ray curing that is cured by irradiation with active energy rays (for example, ultraviolet rays, electron beams, etc.).
- active energy rays for example, ultraviolet rays, electron beams, etc.
- a functional resin for example, a one-step curable thermosetting resin is used.
- thermosetting resin examples include silicone resin, epoxy resin, polyimide resin, phenol resin, urea resin, melamine resin, and unsaturated polyester resin.
- a one-step curable silicone resin is used from the viewpoint of translucency and durability.
- the viscosity of the A-stage one-stage curable resin is, for example, 1,000 mPa ⁇ s or more, preferably 3,000 mPa ⁇ s or more, more preferably 5,000 mPa ⁇ s or more. 1,000,000 mPa ⁇ s or less, preferably 500,000 mPa ⁇ s or less, more preferably 200,000 mPa ⁇ s or less.
- the sealing resin composition may contain the above-described phosphor and / or filler in the above-described mixing ratio, if necessary.
- the above-described components are blended in the mixing container 52 including the stirrer 51, Subsequently, they are mixed using a stirrer 51.
- A-stage one-step curable resin, phosphor and / or filler, and solvent as necessary are mixed and mixed.
- the A-stage sealing resin composition is prepared as a varnish.
- the viscosity of the varnish at 25 ° C. and 1 atm is such that when the varnish is applied to the release sheet 2 (described later), the applied varnish is removed from the peripheral edge of the upper surface of the release sheet 2 (see FIG. 15).
- the A-stage sealing resin composition (varnish) is applied to the release sheet 2 in the application area 9b shown in FIG.
- the sealing layer 61 after application can be heated. Specifically, although not shown in FIG. 14, as illustrated in FIG. 3C, the sealing layer 61 is heated by an oven 55 including two heaters 54.
- the heating condition is a condition in which the curing reaction of the curable resin is not substantially accelerated.
- the temperature is, for example, 40 ° C. or higher, preferably 60 ° C. or higher. 150 ° C or lower, preferably 130 ° C or lower.
- the heating time is, for example, 1 minute or more, preferably 5 minutes or more, and for example, 60 minutes or less, preferably 40 minutes or less.
- the thickness of the applied A-stage sealing layer 61 is, for example, 10 ⁇ m or more, preferably 50 ⁇ m or more, and, for example, 2,000 ⁇ m or less, preferably 1,000 ⁇ m or less.
- the A-stage sealing layer 61 is manufactured.
- the transfer process is performed in the transfer area 10. That is, in the transport process, as in the first embodiment, in the sealing layer manufacturing area 59, the sealing layer 61 manufactured in the sealing layer manufacturing process is transported at room temperature, and the sealing process is performed. Supply to the sealing area 11. Alternatively, the sealing layer 61 is conveyed at a low temperature below room temperature.
- the sealing step is performed in the sealing area 11 as shown in FIG.
- the sealing area 11 includes an LED preparation area 11a, an installation / embedding area 11d, and a C-staging area 11c.
- a substrate 6 on which the LEDs 4 are mounted is prepared.
- the substrate 6 on which the LEDs 4 are mounted is installed in the laminating apparatus 55 shown in FIG.
- the stacking device 55 is arranged continuously (over) the installation / embedding area 11d and the C-staging area 11c.
- the laminating device 55 includes, for example, two flat plates 21 that are opposed to each other with an interval in the vertical direction.
- the two flat plates 21 are configured to be movable in both the installation / embedding area 11d and the C-staging area 11c.
- the substrate 6 on which the LEDs 4 are mounted is installed on the upper flat plate 21.
- the substrate 6 is installed on the lower surface of the flat plate 21 so that the LEDs 4 face downward.
- the sealing layer 61 supplied from the transfer area 10 shown in FIG. 14 is installed on the lower flat plate 21. That is, the sealing layer 61 is disposed so as to face the LED 4.
- the LED 4 is embedded by the sealing layer 61.
- the upper flat plate 21 is lowered (pressed down) so that the substrate 6 on which the LEDs 4 are mounted is lowered.
- the lower flat plate 21 is raised (pushed up) so that the sealing layer 61 laminated on the release sheet 2 rises.
- the LED 4 and the wire 7 are covered with the sealing layer 61. That is, the LED 4 and the wire 7 are embedded in the sealing layer 61.
- the LED 4 and the wire 7 are sealed by the sealing layer 61.
- sealing layer 61 is C-staged in the C-staging area 11c of FIG.
- An oven is provided in the C-staging area 11c.
- the sealing layer 61 is heated. Specifically, the flat plate 21 is moved to the C-staging area 11c while being held between the sealing layers 61 by the flat plate 21 and put into the oven. Thereby, the sealing layer 61 is heated.
- the heating temperature is, for example, 80 ° C. or more, preferably 100 ° C. or more, and for example, 200 ° C. or less, preferably 180 ° C. or less.
- the heating time is, for example, 10 minutes or more, preferably 30 minutes or more, and for example, 10 hours or less, preferably 5 hours or less.
- the heating of the sealing layer 61 causes the A-stage sealing layer 61 to be C-staged (completely cured).
- the A-stage sealing is performed by irradiating the sealing layer 61 with active energy rays in the C-staging area 11c.
- Layer 61 is C-staged (fully cured).
- the A stage sealing layer 61 is irradiated with ultraviolet rays using an ultraviolet lamp or the like.
- T is 24 hours or less, preferably 18 hours or less, more preferably 12 hours or less, further preferably 6 hours or less, particularly preferably 3 hours or less, and for example, 1 second or more, preferably 1 minute or longer.
- the LED device 5 as an optical semiconductor device including the sealing sheet 1, the LED 4 sealed by the sealing sheet 1, and the substrate 6 on which the LED 4 is mounted is manufactured.
- the release sheet 2 is peeled off from the sealing sheet 1 as indicated by a virtual line in FIG.
- the time T from when the A-stage sealing layer 61 is manufactured in the sealing layer manufacturing process until the LED 4 is sealed by the A-stage sealing layer 61 in the sealing process is Since it is a short time, the manufacturing efficiency of the LED device 5 can be improved.
- this method includes a sealing layer manufacturing area 59, a transport area 10 and a sealing area 11 in one (same) factory, specifically, an LED apparatus manufacturing factory 8, and the LED apparatus manufacturing factory.
- a sealing layer manufacturing factory is provided in the LED device manufacturing factory, and the sealing layer manufacturing process and the sealing process are performed in the same factory.
- the A stage sealing layer 61 can be easily designed and managed. Therefore, the degree of freedom in designing and managing the A-stage sealing layer 61 can be increased.
- the sealing layer 61 manufactured in the sealing layer manufacturing process is transported at room temperature and supplied to the sealing process. can do. Therefore, the above-described man-hours and equipment for cooling are unnecessary, and as a result, the manufacturing cost of the LED device 5 can be reduced.
- the above-described cooling is not required, so that it is not necessary to return the cooled sealing layer 61 of the A stage to room temperature, and the manufacturing time can be shortened. Therefore, manufacturing cost can be reduced. Furthermore, since generation
- the sealing layer manufacturing area 59 is provided in advance in the LED device manufacturing factory 8, but for example, as shown in FIG. 12, the movable sealing layer manufacturing unit 191 is replaced with the LED device. It can also be installed in the manufacturing factory 8.
- the sealing layer manufacturing unit 191 is configured in the same manner as the sealing sheet manufacturing unit 91 except that the heating device 118 is not provided (this form is not shown in FIG. 12). Moreover, the sealing sheet manufacturing unit 91, the sheet manufacturing apparatus 93, and the sheet preparation apparatus 99 are a sealing layer manufacturing unit 191, a sealing layer manufacturing apparatus 193, and a sealing layer preparation apparatus 199, respectively.
- the A-stage sealing layer 61 can also be manufactured by such a sealing layer manufacturing unit 191. Thereafter, the LED device 5 can be manufactured by the sealing layer 61.
- platinum-carbonyl complex platinum concentration 2.0 mass% as a hydrosilylation catalyst (platinum content is 0.375 ppm with respect to the organopolysiloxane, that is, 0.375 ⁇ 10 5 with respect to 100 g of the additional raw material. -4 g) was added and stirred at 40 ° C. for 10 minutes to prepare a silicone resin composition (second condensation reaction / addition reaction curable silicone resin).
- the varnish was prepared in the varnish preparation area (see FIG. 2).
- the viscosity of the varnish at 25 ° C. and 1 atm was 20,000 mPa ⁇ s.
- the varnish is applied in a rectangular shape (size: 10 mm ⁇ 100 mm) in plan view with a dispenser (see FIG. 3B) on the surface of the release sheet made of PET.
- the staged area was heated in an oven at 135 ° C. for 15 minutes to produce a B-stage sealing sheet having a thickness of 600 ⁇ m, which was laminated on the release sheet.
- the compression elastic modulus M0 at 25 ° C. of the B-stage sealing sheet immediately after production was measured, it was 0.040 MPa (see Table 1). Specifically, the compression elastic modulus at 25 ° C. was calculated with a precision load measuring machine manufactured by Aiko Engineering. In addition, the compression elastic modulus mentioned later was implemented similarly to the above-mentioned method.
- Production Example 2 to Production Example 10 In Production Example 1, by adjusting the heating time of the oven in the coating area as appropriate from 15 minutes to 25 minutes, it is Production Examples 2 to 10 and the sealing sheet having the compressive modulus shown in Table 1 Got.
- each of the B-stage sealing sheets immediately after production in Production Examples 1 to 10 is housed in a lidded container at room temperature (25 ° C.). It was taken out from the container with a lid and placed in a press machine in which the substrate was installed in the installation / press area.
- the sealing sheet was pushed down at room temperature with a flat plate press, and the LED and the wire were embedded with the sealing sheet at a pressure of 0.3 MPa. Thereby, the LED and the wire were sealed with the sealing sheet.
- Table 1 shows the compression elastic modulus M1 at 25 ° C. of the B-stage sealing sheet at the time when the LED and the wire were embedded.
- the time T from the manufacture of the B-stage sealing sheet (from the B-stage) to the sealing (embedding) of the LED and the wire was 1 minute.
- the flat sheet pressing the sealing sheet and the substrate was put into an oven, and the sealing sheet was heated at 150 ° C. for 2 hours to make the sealing sheet C-staged.
- the degree of cure of the sealing sheet in the LED device was 90%, and the compression modulus was 0.040 MPa.
- Table 1 shows the compression elastic modulus M2 at 25 ° C. of the B-stage sealing sheet at the time when the LEDs and wires in Examples 11 to 17 were sealed (embedded).
- Table 1 shows the compression elastic modulus M3 at 25 ° C. of the B-stage sealing sheet at the time when the LEDs and wires in Comparative Examples 1 to 7 were sealed (embedded).
- Table 1 shows the compression elastic modulus M4 at 25 ° C. of the B-stage sealing sheet when the LEDs and wires in Examples 18 to 23 were sealed (embedded). ⁇ Sealing with sealing sheet stored at 40 ° C./Time T: 36 hours> Comparative Examples 8-13
- the time T from the manufacture of the B-stage sealing sheet (from the B-stage) to the sealing (embedding) of the LED and the wire is changed from 1 minute to 36 hours, and the temperature in the transfer area is set to room temperature.
- the treatment was performed in the same manner as in Examples 1 to 6 except that (25 ° C.) was changed to 40 ° C.
- Table 1 shows the compression elastic modulus M5 at 25 ° C. of the B-stage sealing sheet when the LEDs and wires in Comparative Examples 8 to 13 were sealed (embedded).
- Table 1 shows the compression elastic modulus M6 at 25 ° C. of the B-stage sealing sheet at the time of sealing (embedding) the LEDs and wires in Examples 24-30.
- Table 1 shows the compression elastic modulus M7 at 25 ° C. of the B-stage sealing sheet when the LEDs and wires in Comparative Examples 14 to 20 were sealed (embedded).
- Table 1 shows the physical properties and evaluation results of Production Examples, Examples and Comparative Examples.
- Table 1 shows the Example and / or Comparative Example which preserve
- ⁇ Discussion 1> Compression modulus of sealing sheet and deformation of wire (1-1) Upper limit value of compression modulus From the evaluation results of Examples 1 to 30 and Comparative Examples 1 to 20, the LED was sealed (embedded) If the compression elastic modulus (M1 to M7) of the B-stage sealing sheet exceeds 0.160 MPa (Comparative Examples 6, 7, 12, 13 and 20), the wire is deformed, and if it is 0.160 MPa or less. (Examples 1 to 30 and Comparative Examples 1 to 5, 8 to 11, and 14 to 19), it was found that the wire was not deformed.
- the upper limit of the compression elastic modulus (M1 to M7) of the B-stage sealing sheet at the time of sealing (embedding) the LED that can be sealed without causing deformation of the wire is 0.160 MPa.
- (1-2) Lower limit value of compression elastic modulus The compression elastic modulus M0 at 25 ° C. of the B-stage sealing sheet immediately after production of Production Example 1 is 0.040 MPa, and the compression elastic modulus lower than this compression elastic modulus M0 If it exists, it turned out that the shape of a sealing sheet cannot be ensured.
- Example 1 Comprising: Specifically, the sealing sheet of the B stage immediately after manufacture of manufacture example 1 is preserve
- Compression elastic modulus of sealing sheet immediately after production Examples 11 to 17 have a compression elastic modulus (M2) of the B-stage sealing sheet at the time of sealing (embedding) the LED of 0.055 MPa to 0. In the range of 160 MPa, even if the LED is sealed using this, the wire is not deformed.
- M2 compressive elastic modulus
- Each of Examples 11 to 17 is different from Production Examples 1 to 8 in which the compression elastic modulus (M0) of the B-stage sealing sheet immediately after production is in the range of 0.040 MPa to 0.145 MPa at 25 ° C. After being stored for a long time, the LED is sealed with the B-stage sealing sheet.
- M0 compression elastic modulus
- the compression elastic modulus (M0) of the B-stage sealing sheet immediately after production is set in the range of 0.040 to 0.145 MPa, it is stored at room temperature for 24 hours after production. It was found that even when sealed, the deformation of the wire can be prevented.
- the compression elastic modulus (M2) 0.160 MPa of the B-stage sealing sheet at the time of sealing (embedding) in Example 17 is the compression elastic modulus ( M0)
- the compression modulus is 0.120 MPa higher than 0.040 MPa.
- the compression modulus (M2) immediately after production is 0.040 MPa (Production Example 1)
- the compression modulus (M2) at the time of sealing (embedding) is 0.160 MPa (Example 17).
- a fast-curing sealing sheet can also be selected.
- the wire can be sealed without causing deformation, and the amount of increase in the compression modulus at 25 ° C. when the fast-curing sealing sheet produced in the sheet production process is stored at 25 ° C. for 24 hours.
- the upper limit of ⁇ M was found to be 0.120 MPa.
- the time for making the C stage under a heating condition of 150 ° C. is 15 minutes according to the following formula: Is calculated.
- Reference example 1 The encapsulating sheet of Production Example 1 immediately after production is accommodated in a lidded container 17 shown in FIG. 6, and the lidded containers 17 are stacked in five stages in the vertical direction, and these lidded containers 17 are made of aluminum pouches (storage). Bag). Thereafter, the pouch was stored in a freezer at ⁇ 15 ° C. for 3.5 hours. Thereafter, this was taken out from the freezer, and then placed on a stainless steel stand in an atmosphere of 20 ° C. and relative humidity of 37% for a predetermined time. That is, the sealing sheet was returned to room temperature. Moreover, the surface temperature of the sealing sheet in a pouch at this time was measured.
- FIG. 11 shows the relationship between the surface temperature of the sealing sheet and the elapsed time after placing the lidded container on the stainless steel stand.
- Reference example 2 The container 17 with the lid is taken out from the pouch taken out from the freezer, and the container is placed as it is on a stainless steel stand under an atmosphere of 20 ° C. and a relative humidity of 37% for 3 hours as in Reference Example 1. Processed.
- the manufacturing method of an optical semiconductor device is used as a manufacturing method of an LED device or an LD device.
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Abstract
Description
図1~図10を参照して、本発明の光半導体装置の製造方法の第1実施形態であるLED装置5の製造方法について説明する。
シート製造工程は、シート製造エリア9において実施される。
搬送工程は、図2に示すように、搬送エリア10において実施される。搬送エリア10は、シート製造エリア9と封止エリア11との間に設けられている。
図2に示すように、封止工程は、封止エリア11において実施される。封止エリア11は、LED用意エリア11a、設置/プレスエリア11bおよびCステージ化エリア11cを備えている。
なお、第1実施形態では、図9の実線矢印で示すように、上側の平板21を下側の平板21に近接させているが、例えば、図9の破線で示すように、下側の平板21を上側の平板21に近接させることもできる。つまり、下側の平板21に配置され、LED4が実装される基板6を、封止シート1に向けてプレスする。
次に、図12および図2を参照して、封止シート製造ユニット91を用いて封止シート1を製造し、その後、封止シート1によって、LED4を封止してLED装置5を製造する方法について説明する。
この方法では、まず、封止シート製造ユニット91を、LED装置製造工場8内に移動させる。
次いで、コンテナ92内において、シート製造装置93を運転して、封止シート1を製造する。具体的には、ワニスを、剥離シート2の表面に塗布し、その後、ワニスが2段階硬化型熱硬化性樹脂を含有する場合には、加熱装置118でワニスを加熱することによって、ワニスをBステージ化(半硬化)して、封止シート1を得る。
封止シート製造ユニット91によって必要数の封止シート1が製造されるとともに、プレス機20において必要数のLED装置5が製造されれば、次いで、封止シート製造ユニット91を別のLED装置製造工場内や設置箇所、具体的には、最初のLED装置製造工場8と離間した地域に設備された次のLED装置製造工場内や設置箇所に、封止シート製造ユニット91を移動させる。その後、トレーラー150および封止シート製造ユニット91を、最初のLED装置製造工場8内や設置箇所から、次のLED装置製造工場内や設置箇所に移動させる。
この変形例の封止シート製造ユニット91によれば、シート製造装置93をコンテナ92とともに、Bステージの封止シート1によって封止対象であるLED4を封止するLED装置製造工場内やLED装置製造工場の近傍におけるコンテナ92の設置箇所に移動させることができる。そのため、LED装置製造工場8内や設置箇所においてBステージの封止シート1を製造することができる。そのため、製造したBステージの封止シート1を、LED装置製造工場8の建屋(図示せず)内に設備されたプレス機20に、そのまま、短時間で搬送することができる。その結果、製造後に封止シート1を搬送するための搬送時間を大幅に短縮することができる。
図13~図16を参照して、本発明の光半導体装置の製造方法の第2実施形態であるLED装置5の製造方法について説明する。
封止層製造エリア59は、Bステージ化エリア9c(図2参照)を備えず、ワニス調製エリア9aおよび塗布エリア9bを備えている。
搬送工程は、図14に示すように、搬送エリア10において実施される。つまり、搬送工程では、第1実施形態と同様に、封止層製造エリア59において、封止層製造工程で製造された封止層61を、室温で搬送して、封止工程が実施される封止エリア11に供給する。あるいは、封止層61を、室温未満の低温で搬送する。
封止工程は、図14に示すように、封止エリア11において実施される。封止エリア11は、LED用意エリア11a、設置/埋設エリア11dおよびCステージ化エリア11cを備えている。
図14の実施形態では、LED装置製造工場8に封止層製造エリア59を予め設けているが、例えば、図12が参照されるように、移動可能な封止層製造ユニット191を、LED装置製造工場8内に設置することもできる。
製造例1
シート製造エリア(図2参照)において、封止シートを製造した。具体的には、まず、40℃に加温したシラノール基両末端ポリジメチルシロキサン[下記式(1)中のR1が全てメチル基、n=155で表される化合物、平均分子量11,500]2031g(0.177mol)に対して、エチレン系不飽和炭化水素基含有ケイ素化合物として、ビニルトリメトキシシラン[下記式(2)中のR2がビニル基、X1が全てメトキシ基で表される化合物]15.76g(0.106mol)、および、エチレン系不飽和炭化水素基含有ケイ素化合物として、(3-グリシドキシプロピル)トリメトキシシラン[下記式(3)中のR3が3-グリシドキシプロピル基、X2が全てメトキシ基で表される化合物]2.80g(0.0118mol)[シラノール基両末端ポリジメチルシロキサンのSiOH基のモル数と、エチレン系不飽和炭化水素基含有ケイ素化合物のSiX1基およびエチレン系不飽和炭化水素基含有ケイ素化合物のSiX2基の総モル数との比[SiOH/(SiX1+SiX2)=1/1]を攪拌して混合した後、縮合触媒として水酸化テトラメチルアンモニウムメタノール溶液(濃度10質量%)0.97mL(触媒量:0.88mol、シラノール基両末端ポリジメチルシロキサン100モルに対して0.50モル、縮合原料100gに対して4.0mg)を加え、40℃で1時間攪拌した。得られたオイルを、40℃で1時間攪拌しながら減圧(10mmHg)し、揮発分を除去した。次に、反応液を常圧に戻した後、オルガノハイドロジェンポリシロキサン(ジメチルポリシロキサン-co-メチルハイドロジェンポリシロキサン)を、アルケニル基のヒドロシリル基に対するモル比がSiR2/SiH=1/3.0となるように加えて、40℃で1時間攪拌した。その後、ヒドロシリル化触媒として白金-カルボニル錯体(白金濃度2.0質量%)0.038mL(白金含有量はオルガノポリシロキサンに対して0.375ppm、つまり、付加原料100gに対して0.375×10-4g)を加えて、40℃で10分間攪拌し、シリコーン樹脂組成物(第2の縮合反応・付加反応硬化型シリコーン樹脂)を調製した。
製造例1において、塗布エリアでのオーブンの加熱時間を、15分間以上25分間以下で適宜調整することにより、製造例2~10であって、表1に記載される圧縮弾性率の封止シートを得た。
<25℃で搬送した封止シートによって封止/時間T:1分間>
実施例1~10
封止エリアのLED用意エリア(図2参照)において、平面視矩形状のLEDがワイヤボンディング接続された基板を用意した(図9参照)。LEDおよびワイヤの寸法は、以下の通りであった。
ワイヤの線径:30μm
続いて、LEDがワイヤボンディング接続された基板を封止エリアにおけるプレス機に設置した(図2および図9参照)。
実施例11~17
Bステージの封止シートを製造して(Bステージ化して)からLEDおよびワイヤを封止(埋設)するまでの時間Tを、1分間から24時間に変更した以外は、実施例1~5、7および8と同様に処理した。
比較例1~7
Bステージの封止シートを製造して(Bステージ化して)からLEDおよびワイヤを封止(埋設)するまでの時間Tを、1分間から36時間に変更した以外は、実施例1~5、7および8と同様に処理した。
実施例18~23
Bステージの封止シートを製造して(Bステージ化して)からLEDおよびワイヤを封止(埋設)するまでの時間Tを、1分間から24時間に変更し、かつ、搬送エリアにおける温度を室温(25℃)から40℃に変更した以外は、実施例1~6と同様に処理した。
<40℃で保存した封止シートによって封止/時間T:36時間>
比較例8~13
Bステージの封止シートを製造して(Bステージ化して)からLEDおよびワイヤを封止(埋設)するまでの時間Tを、1分間から36時間に変更し、かつ、搬送エリアにおける温度を室温(25℃)から40℃に変更した以外は、実施例1~6と同様に処理した。
実施例24~30
Bステージの封止シートを製造して(Bステージ化して)からLEDおよびワイヤを封止(埋設)するまでの時間Tを、1分間から24時間に変更し、かつ、搬送エリアにおける温度を室温(25℃)から-15℃に変更した以外は、実施例1~5、7および9と同様に処理した。
比較例14~20
Bステージの封止シートを製造して(Bステージ化して)からLEDおよびワイヤを封止(埋設)するまでの時間Tを、1分間から36時間に変更し、かつ、搬送エリアにおける温度を室温(25℃)から-15℃に変更した以外は、実施例1~5、7および9と同様に処理した。
[ワイヤの変形の有無]
実施例1~30および比較例1~20のワイヤを観察したところ、比較例6、7、12、13および20については、ワイヤの変形が認められた。
表1の縦欄は、製造例で製造した封止シートを保存して用いた実施例および/または比較例を示し、左端欄に記載した条件で保存した後の圧縮弾性率を記載する。
(1) 封止シートの圧縮弾性率とワイヤの変形
(1-1) 圧縮弾性率の上限値
実施例1~30および比較例1~20の評価結果から、LEDを封止(埋設)した時点のBステージの封止シートの圧縮弾性率(M1~M7)が0.160MPaを超えれば(比較例6、7、12、13および20)、ワイヤに変形を生じ、0.160MPa以下であれば(実施例1~30および比較例1~5、8~11および14~19)、ワイヤに変形を生じないことが分かった。
(1-2) 圧縮弾性率の下限値
製造例1の製造直後のBステージの封止シートの25℃における圧縮弾性率M0が0.040MPaであり、この圧縮弾性率M0より低い圧縮弾性率であれば、封止シートの形状確保ができないことが分かった。そうすると、実施例1であって、具体的には、製造例1の製造直後のBステージの封止シートを、常温で1分間保存し、その後、LEDを封止(埋設)した時点の封止シートの25℃における圧縮弾性率(M2)の下限値は、0.040MPaであることが分かった。
(2) 製造直後の封止シートの圧縮弾性率
実施例11~17は、LEDを封止(埋設)した時点のBステージの封止シートの圧縮弾性率(M2)が、0.055MPa~0.160MPaの範囲にあって、これを用いてLEDを封止しても、ワイヤに変形を生じない。
(3) (速硬化性の封止シート)
実施例11の封止(埋設)した時点のBステージの封止シートの圧縮弾性率(M2)は、製造例1の製造直後のBステージの封止シートの圧縮弾性率(M0)に対して、0.015MPa高い(ΔM=M2-M0)。つまり、製造された封止シートは、25℃で24時間保存されることによって、圧縮弾性率が0.015MPa(ΔM)上昇する。
(4) (速硬化性の封止シートを用いるときのLED装置の製造効率)
25℃における圧縮弾性率の増加量ΔMが0.120MPaである速硬化性の封止シートを用いる場合には、150℃の加熱条件でCステージにするための時間は、下記式によって、15分間と算出される。
そのため、封止シートが速硬化性である場合には、Cステージにかかる時間を8倍(=2[時間]/0.25[時間])短縮することができる。つまり、Cステージにかかる時間の短縮によって、LED装置の製造効率を大きく向上させることができることが分かった。
参考例1
製造直後の製造例1の封止シートを、図6に示す蓋付容器17に収容し、かかる蓋付容器17を上下方向に5段積み重ね、これら蓋付容器17を、アルミニウム製のパウチ(保存袋)に収容した。その後、かかるパウチを-15℃の冷凍庫に3.5時間保存した。その後、これを、冷凍庫から取り出し、次いで、20℃、相対湿度37%の雰囲気下にあるステンレス台の上に所定時間載置した。つまり、封止シートを室温に戻した。また、このときの、パウチ内の封止シートの表面温度を測定した。
図11から分かるように、冷却されたパウチ内の封止シートの表面温度を、室温に戻すのに要する時間は、3時間であった。
冷凍庫から取り出したパウチから、蓋付容器17を取り出し、かかる収容器をそのまま20℃、相対湿度37%の雰囲気下にあるステンレス台の上に3時間載置した以外は、参考例1と同様に処理した。
表面温度が室温に戻された封止シートの表面には、結露が観察された。
(冷凍状態から室温に戻すまでの時間)
冷凍庫で冷却された封止シートの表面温度を、結露を生じることなく、室温(つまり、封止工程に供給する温度)に戻す際には、「パウチ内に収容したままの状態」で、室温で保存する必要があることが分かった。
4 LED
5 LED装置
61 封止層
Claims (6)
- 封止層によって光半導体素子を封止して、光半導体装置を製造する光半導体装置の製造方法であり、
前記封止層を製造する封止層製造工程、および、
前記封止層によって前記光半導体素子を封止する封止工程
を備え、
前記封止層製造工程において前記封止層を製造してから、前記封止工程において前記封止層によって前記光半導体素子を封止するまでの時間が、24時間以下であることを特徴とする、光半導体装置の製造方法。 - 前記封止層製造工程で製造された前記封止層を、室温で搬送して、前記封止工程に供給することを特徴とする、請求項1に記載の光半導体装置の製造方法。
- Bステージの封止シートによって前記光半導体素子を封止して、前記光半導体装置を製造する光半導体装置の製造方法であり、
前記封止層製造工程は、Bステージの前記封止シートを製造するシート製造工程であり、
前記封止工程では、Bステージの前記封止シートによって前記光半導体素子を封止し、
前記シート製造工程においてBステージの前記封止シートを製造してから、前記封止工程においてBステージの前記封止シートによって前記光半導体素子を封止するまでの時間が、24時間以下であることを特徴とする、請求項1に記載の光半導体装置の製造方法。 - 前記シート製造工程で製造されたBステージの前記封止シートの25℃における圧縮弾性率が、0.040MPa以上、0.145MPa以下であることを特徴とする、請求項3に記載の光半導体装置の製造方法。
- 前記シート製造工程で製造されたBステージの前記封止シートを25℃で24時間保存したときの、25℃における圧縮弾性率の増加量が、0.015MPa以上、0.120MPa以下であることを特徴とする、請求項3に記載の光半導体装置の製造方法。
- Aステージの封止層によって前記光半導体素子を封止して、前記光半導体装置を製造する光半導体装置の製造方法であり、
前記封止層製造工程では、Aステージの前記封止層を製造し、
前記封止工程では、Aステージの前記封止層によって前記光半導体素子を封止し、
前記封止層製造工程においてAステージの前記封止層を製造してから、前記封止工程においてAステージの前記封止層によって前記光半導体素子を封止するまでの時間が、24時間以下であることを特徴とする、請求項1に記載の光半導体装置の製造方法。
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US14/778,196 US20160284951A1 (en) | 2013-03-22 | 2014-03-10 | Method for producing optical semiconductor device |
KR1020157025965A KR20150135283A (ko) | 2013-03-22 | 2014-03-10 | 광반도체 장치의 제조 방법 |
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- 2014-03-10 WO PCT/JP2014/056101 patent/WO2014148286A1/ja active Application Filing
- 2014-03-10 US US14/778,196 patent/US20160284951A1/en not_active Abandoned
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