WO2011024820A1 - 電子装置、および、電子装置の製造方法 - Google Patents
電子装置、および、電子装置の製造方法 Download PDFInfo
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- WO2011024820A1 WO2011024820A1 PCT/JP2010/064309 JP2010064309W WO2011024820A1 WO 2011024820 A1 WO2011024820 A1 WO 2011024820A1 JP 2010064309 W JP2010064309 W JP 2010064309W WO 2011024820 A1 WO2011024820 A1 WO 2011024820A1
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/13—Discrete devices, e.g. 3 terminal devices
- H01L2924/1301—Thyristor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/13—Discrete devices, e.g. 3 terminal devices
- H01L2924/1304—Transistor
- H01L2924/1305—Bipolar Junction Transistor [BJT]
- H01L2924/13055—Insulated gate bipolar transistor [IGBT]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/13—Discrete devices, e.g. 3 terminal devices
- H01L2924/1304—Transistor
- H01L2924/1306—Field-effect transistor [FET]
- H01L2924/13091—Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/14—Integrated circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/19—Details of hybrid assemblies other than the semiconductor or other solid state devices to be connected
- H01L2924/1901—Structure
- H01L2924/1904—Component type
- H01L2924/19041—Component type being a capacitor
Definitions
- the present invention relates to an electronic device including a semiconductor element and the like, and a method for manufacturing the electronic device.
- Patent Document 1 a power element to which a metal wire is connected by wire bonding is housed in a case, and after a silicone resin is injected from above the case, a suction nozzle is inserted, and the silicone resin is left leaving the required height. A method for suction removal is disclosed.
- wires are wired with high density, it is desirable that the wires are covered with a synthetic resin from the viewpoint of preventing a short circuit between adjacent wires. Also in other electronic devices, securing the corrosion resistance of the wire and preventing a short circuit between the wire and another member or the wire are important, and the advantage that the wire is coated is great.
- One or more embodiments of the present invention have a structure in which an electronic component subjected to wire bonding is covered with a synthetic resin, the vibration of the synthetic resin can be prevented from being transmitted to the wire, and the wire is covered with the synthetic resin. Provided structure.
- an electronic device includes a case, an electronic component housed in the case, a metal wire bonded to the electronic component by wire bonding, and the metal wire bonded. And a synthetic resin that covers the bonding surface and the metal wire.
- the metal wire is injected into the case with an amount of the synthetic resin such that a part of the metal wire is exposed from the upper surface of the synthetic resin, and the case is left under reduced pressure to leave the liquid level of the synthetic resin.
- the synthetic resin may be coated by attaching the synthetic resin to the metal wire exposed above the synthetic resin.
- the electronic component to which the metal wire is bonded by wire bonding is accommodated in the case, the bonding surface is covered with the synthetic resin injected into the case, and the metal wire is above the synthetic resin. Exposed. For this reason, the vibration of the synthetic resin is not easily transmitted to the metal wire. Furthermore, when the liquid level of the synthetic resin rises under reduced pressure, the synthetic resin also adheres to the metal wire exposed on the synthetic resin, thereby covering the metal wire with the synthetic resin. For this reason, while improving the corrosion resistance of a metal wire, insulation protection can be performed.
- the above structure may further include a resin receiving portion that is provided in the case and into which the synthetic resin flows when the injected liquid level of the synthetic resin reaches above the metal wire.
- the resin receiving portion may be formed of a recessed portion exposed in the space inside the case, and the edge of the recessed portion may be located at the same height as the upper end of the metal wire.
- the synthetic resin when the liquid level of the synthetic resin rises above the metal wire under reduced pressure, the synthetic resin surely flows into the concave portion of the resin receiving portion and is stored. By detecting the synthetic resin, it can be easily and quickly detected that the metal wire is covered with the synthetic resin up to the top.
- the resin receiving portion may be formed by cutting out a side wall of the case, and may have a concave portion exposed to a space inside the case, and an edge of the concave portion is equal to an upper end of the metal wire. It may be located at the height of.
- the metal wire is covered with the synthetic resin up to the upper part by detecting the synthetic resin accumulated in the recess.
- the concave portion is formed by cutting out the side wall of the case, it is not necessary to secure a space for providing the concave portion in the case. Therefore, without restricting the arrangement of each portion in the case due to the convenience of the detection process, Without impairing the degree of freedom of arrangement, it can be detected more easily and more quickly that the metal wire is covered with the synthetic resin up to the top.
- the above structure is further provided on the side wall of the case.
- the synthetic resin is removed from the case.
- the resin receiving portion is provided on the outer surface of the case below the through hole, and has a recess for storing the synthetic resin flowing out of the through hole. Also good.
- the synthetic resin when the liquid level of the synthetic resin rises above the metal wire under reduced pressure, the synthetic resin surely flows into the recess of the resin receiving portion through the through hole and is stored. Therefore, it can detect that the metal wire was coat
- the concave portion of the resin receiving portion is provided outside the case, the synthetic resin accumulated in the concave portion can be easily detected without being affected by the arrangement state of electronic components and metal wires inside the case. Furthermore, it is not necessary to secure a space for providing a recess in the case.
- an electronic device is formed by bonding a metal wire to an electronic component housed in a case by wire bonding, and covering the bonding surface to which the metal wire is bonded with a synthetic resin.
- An apparatus manufacturing method includes a step (injection step) of injecting the synthetic resin in an amount such that at least a part of the metal wire is exposed from an upper surface of the synthetic resin, and the case in which the synthetic resin is injected. Is placed under reduced pressure, the liquid level of the synthetic resin is raised by reducing the pressure, and the metal wire exposed above the synthetic resin is covered with the synthetic resin (decompression step).
- an electronic component to which a metal wire is bonded by wire bonding is accommodated in the case, the bonding surface is covered with the synthetic resin injected into the case, and the metal wire is exposed above the synthetic resin.
- the vibration of the synthetic resin is not easily transmitted to the metal wire.
- the liquid level of the synthetic resin is raised during the decompression process, so that the entire portion of the metal wire can be synthesized without being injected into the case.
- the resin can be applied and coated. Therefore, without introducing new equipment or increasing the size of the electronic device, the bonding surface of the electronic device is covered with synthetic resin, and the metal wire is exposed on the synthetic resin so that the vibration of the synthetic resin is transmitted to the metal wire.
- the metal wire can be covered with a synthetic resin.
- the decompression step the case into which the synthetic resin has been injected is placed under reduced pressure, and during this time, defoaming for removing bubbles and moisture in the case can be performed. For this reason, man-hours can be reduced by performing defoaming together in the step of raising the liquid level of the synthetic resin and attaching the synthetic resin to the metal wire.
- the synthetic resin a resin that is a fluid in the injection process and hardens after the decompression process may be used.
- a curing step for curing the synthetic resin in a solid or gel form may be provided after the decompression step.
- the synthetic resin attached to the metal wire in the decompression step is a time that does not drop off from the metal wire.
- the synthetic resin may be cured.
- both ends of the metal wire may be bonded to the bonding surface, and the metal wire may be formed in an upward convex shape, and when the synthetic resin is injected into the case, the metal wire Injecting the synthetic resin to a height at which at least the top of the convex shape of the wire is exposed above the upper surface of the injected synthetic resin and all the bonding surfaces are covered by the injected synthetic resin May be.
- the bonding surface can be more reliably covered with the synthetic resin while the metal wire formed in the upward convex shape is exposed on the synthetic resin.
- an injection nozzle for injecting the synthetic resin into the case is moved on the metal wire, and the metal wire is positioned above the liquid surface of the synthetic resin. You may apply the said synthetic resin to.
- the synthetic resin when the synthetic resin is injected, the synthetic resin is applied to the metal wire exposed above the liquid surface of the injected synthetic resin by applying the synthetic resin from above the metal wire. Once attached, the metal wire can be coated with a synthetic resin.
- the case is provided with a resin receiving portion into which the synthetic resin flows when the liquid level of the injected synthetic resin reaches above the metal wire, and the synthetic resin flowing into the resin receiving portion is detected. May be.
- the detection step it is possible to easily confirm that the metal wire is covered with the synthetic resin by detecting the inflow of the synthetic resin to the resin receiving portion, and the metal wire coating is left incomplete. There is nothing to do. Thereby, the electronic device which coat
- a concave portion for storing the synthetic resin may be provided in the resin receiving portion, and the synthetic resin flowing into the concave portion may be optically detected by irradiating the concave portion with inspection light.
- the liquid level of the synthetic resin rises above the metal wire in the decompression step, and whether or not the synthetic resin has flowed into the recess of the resin receiving portion is irradiated with inspection light to optically Therefore, it can be detected easily and promptly by a non-contact method that the metal wire is covered with the synthetic resin up to the upper part.
- a metal wire is bonded to an electronic component housed in a case by wire bonding, and a bonding surface to which the metal wire is bonded is covered with a synthetic resin for sealing.
- the method for manufacturing an electronic device includes a step of injecting the synthetic resin into the case from above the electronic component by an injection nozzle. In this step, the injection nozzle is moved on the metal wire. The synthetic resin is caused to flow down from above the metal wire and adhere to the metal wire. According to this method, an electronic component to which a metal wire is bonded by wire bonding is accommodated in the case, the bonding surface is covered with the synthetic resin injected into the case, and the metal wire is exposed above the synthetic resin.
- FIG. 1 is a cross-sectional view showing a schematic configuration of a switch module 102 according to a first exemplary embodiment to which the present invention is applied.
- the switch module 102 shown in FIG. 1 is configured by housing a substrate 115 on which a semiconductor element 111 is mounted in a case 110 whose upper surface is open.
- the semiconductor element 111 as an electronic component is a switching element for supplying power corresponding to a large current, such as an IGBT, a power MOSFET, a thyristor, or a diode.
- the substrate 115 has a three-layer structure in which an insulating substrate 115C is sandwiched between the upper surface insulating substrate 115A and the lower surface insulating substrate 115B and bonded by a brazing material or the like.
- the upper surface insulating substrate 115A and the lower surface insulating substrate 115B include For example, a circuit pattern constituting a power supply circuit is formed.
- the semiconductor element 111 is electrically connected to a pattern formed on the upper insulating substrate 115A and the lower insulating substrate 115B by solder 118.
- the case 110 includes a base substrate 112 that forms the bottom surface thereof, and a substantially cylindrical housing 113 that is fixed to the peripheral edge of the base substrate 112.
- the housing 113 and the base substrate 112 are fixed by an adhesive or the like so that the liquid does not leak, and the case 110 can be filled with the liquid.
- the lower portion of the substrate 115 is fixed with an insulating bonding material 117.
- the housing 113 is provided with an external terminal 114 that protrudes to the outside of the case 110.
- the external terminal 114 is a metal terminal that penetrates the housing 113 so as to straddle the inside and outside of the case 110 and is connected to a circuit outside the case 110.
- the external terminal 114 is provided to connect the semiconductor element 111 accommodated in the case 110 to a circuit outside the case 110.
- the external terminal 114 and the semiconductor element 111 are connected to the wire 119 ( Electrically connected by metal wire).
- the wire 119 is a metal wire formed by wire bonding, and is specifically a wire made of gold or aluminum having a thickness of several tens to several hundreds of ⁇ m.
- One end of the wire 119 is joined to a metal part of an external connection terminal (not shown) provided in the semiconductor element 111 by a load and ultrasonic waves, and the other end of the wire 119 is joined to the external terminal 114 in the same manner.
- the gap is conducted through the wire 119.
- a portion (surface) where the wire 119 is bonded to the semiconductor element 111 is referred to as a bonding surface 121
- a portion (surface) where the wire 119 is bonded to the external terminal 114 is referred to as a bonding surface 122.
- the bonding surfaces 121 and 122 are in a state where the metal is exposed to the atmosphere.
- the wire 119 is formed so that the center part is convex upward and both ends joined by the bonding surfaces 121 and 122 are lowest. Therefore, the switching device 101 as an electronic device is manufactured by injecting silicone resin into the switch module 102 shown in FIG. 1 to cover the bonding surfaces 121 and 122.
- the method for manufacturing the switching device 101 includes the following three steps. 1. An injection process for injecting silicone resin into the switch module 102. 2. A pressure reducing step in which the switch module 102 into which the silicone resin is injected is placed under a reduced pressure. 3. A curing process for curing the silicone resin.
- the silicone resin injected into the case 110 is, for example, a two-component resin in which a main agent is mixed with a curing agent, has a predetermined viscosity and fluidity at the time of injection, and then cures under predetermined curing conditions. It becomes gel or solid.
- curing conditions for the silicone resin 130 include irradiation with light (ultraviolet rays) and heating. Typical curing conditions for thermosetting silicone resins with curing conditions of temperature and time are: normal temperature (20 ° C. ⁇ 15 ° C. according to JIS standards) to 150 ° C., time tens of minutes to 3 hours Degree.
- a thermosetting silicone resin 130 (FIGS. 2 to 5) that cures at 80 ° C. for 1 hour will be described.
- FIG. 2 is an explanatory view showing an injection process, and shows a cross-section of the main part of the switch module 102 as in FIG.
- the silicone resin 130 is injected into the case 110 of the switch module 102 from above, and the injection amount of the silicone resin 130 is controlled so that the liquid level of the silicone resin 130 becomes the height indicated by the symbol LH in the drawing. .
- the liquid surface height LH of the silicone resin 130 is sufficiently lower than the height T of the uppermost portion (wire top) of the wire 119.
- the height LH is a height at which the metal of the bonding surfaces 121 and 122 is immersed in the silicone resin 130 and the top of the wire 119 and the vicinity thereof are above the liquid level of the silicone resin 130.
- the height LH is an index of the amount of the silicone resin 130 injected in the injection process.
- the injection amount is determined so that the liquid level is LH while the liquid level of the silicone resin 130 is stationary. For this reason, there is no problem even if the liquid level is disturbed by the flow of the silicone resin 130 in the injection step and the liquid level becomes higher than the height LH.
- This injection step may be performed under normal pressure conditions, but may be performed under reduced pressure conditions. That is, when the silicone resin 130 is injected into the switch module 102 by an apparatus to be described later, the entire switch module 102 and the nozzle for injecting the silicone resin 130 are accommodated in the chamber, and the inside of the chamber is decompressed, so-called Silicone resin 130 may be injected by vacuum injection. When vacuum injection is performed, there is an advantage that the silicone resin 130 can be injected quickly.
- a decompression process is performed.
- the switch module 102 is left for a predetermined time in a decompression environment.
- the switch module 102 into which the silicone resin 130 has been injected is housed in a sealable chamber (chamber or the like), and the degree of vacuum in this chamber is set to 600 Pa to 1000 Pa.
- the switch module 102 is left for about 10 minutes to 1 hour at the above-described degree of vacuum.
- the degree of vacuum in the chamber in which the switch module 102 is accommodated in the decompression step may be higher (the pressure is lower) than that in the injection step, or may be the same as that in the injection step.
- the air that has entered the gaps between the semiconductor element 111 in the switch module 102 and between the substrate 115 and the base substrate 112 expands along with the decompression and becomes bubbles to enter the silicone resin 130. Float up.
- the expanded bubbles float from the vicinity of the bottom of the case 110 into the silicone resin 130, so that the silicone resin 130 foams and blows up as a whole, and the liquid level of the silicone resin 130 rises as shown in FIG.
- the liquid level of the silicone resin 130 rises greatly exceeding the height LH, and the top portion of the wire 119 exposed on the silicone resin 130 in the injection process is submerged in the silicone resin 130, and the wire 119 Silicone resin 130 adheres to the whole.
- the silicone resin 130 When time elapses with the switch module 102 under reduced pressure, the air present in the gaps in the case 110 escapes from the silicone resin 130, and bubbles are blown up. Thereby, the liquid level of the silicone resin 130 falls and returns to the height LH corresponding to the amount injected in the injection step.
- the silicone resin 130 has a high viscosity, after the silicone resin 130 has returned to the height of the symbol LH, the silicone resin 130 remains attached to the surface once immersed in the silicone resin 130. It will remain. It is clear that the coating remains for several hours to several tens of hours based on the viscosity of a general silicone resin. Accordingly, the silicone resin 130 is blown up to the position of the wire top T in the decompression step, so that a film of the silicone resin 130 is formed on the entire wire 119.
- the height at which the silicone resin 130 blows up in the decompression process is the size of the substrate 115 accommodated in the case 110, the number of elements mounted on the substrate 115 including the semiconductor element 111, the characteristics of the silicone resin 130, and the vacuum in the decompression process.
- the silicone to be injected in the injection process so that the silicone resin 130 is blown up to the position T of the wire top in the pressure reduction process. What is necessary is just to determine the quantity of the resin 130.
- FIG. since the time for leaving the switch module 102 in the decompression process is sufficient as long as it can be sufficiently defoamed, it is determined in consideration of the number of elements in the switch module 102 and the characteristics of the silicone resin 130 and the degree of vacuum in the decompression process. That's fine. In general, the higher the degree of vacuum and the longer the time, the more defoaming can be ensured. Therefore, the degree of vacuum and time may be determined in consideration of the state of defoaming and productivity.
- the silicone resin 130 injected into the switch module 102 is mixed with a curing agent.
- the switch module 102 is left for a predetermined time in an environment that satisfies the curing condition of the silicone resin 130.
- a thermosetting silicone resin is used
- the switch module 102 is left in a state where a temperature of a predetermined temperature or higher (room temperature to 150 ° C.) is maintained.
- a photocurable silicone resin when a photocurable silicone resin is used, light is irradiated by an ultraviolet lamp (not shown) or the like.
- the switch module 102 is left at 80 ° C. for 1 hour until the silicone resin 130 is cured.
- the coating of the silicone resin 130 formed on the wire 119 as described above is held for a long time due to the viscosity of the silicone resin 130, and thus becomes a gel or a solid in the curing step. For this reason, the wire 119 is covered with a film of the silicone resin 130 that has lost its fluidity.
- the switch module 102 may be under reduced pressure conditions following the pressure reduction step, or the vacuum degree may be gradually reduced to normal pressure conditions. Also good.
- FIG. 4 is a cross-sectional view of the main part showing the configuration of the manufactured switching device 101.
- the case 110 of the switching device 101 is filled with a silicone resin 130 to a height LH that covers both the bonding surfaces 121 and 122 and hardened in a gel state.
- the wire 119 is disposed above the silicone resin 130. Some are out. A portion of the wire 119 that protrudes above the upper surface of the silicone resin 130 is covered with a resin coating 131 obtained by curing the silicone resin 130.
- FIG. 5 is a schematic diagram showing a configuration of an injection apparatus 1100 for realizing the manufacturing method described with reference to FIGS.
- the injection device 1100 shown in FIG. 5 can execute a series of steps of an injection step, a pressure reduction step, and a curing step on the switch module 102.
- Injection device 1100 is a device capable of injecting two-component silicone resin 130 into switch module 102.
- the injection device 1100 includes a vacuum chamber 1150 that houses the switch module 102 to be injected.
- the vacuum chamber 1150 includes a table 1153 on which a plurality of switch modules 102 can be placed side by side, and a plurality of injection nozzles 1152 suspended from the ceiling in the vacuum chamber 1150. Silicone resin 130 can be injected by injection nozzle 1152.
- the vacuum chamber 1150 is configured to be airtight and can be closed, and a vacuum pump 1135 is connected via a valve 1136. With this vacuum pump 1135, the inside of the vacuum chamber 1150 can be decompressed and maintained in a vacuum state during and after the injection.
- the vacuum chamber 1150 includes a heater (not shown) capable of heating the inside to about 150 ° C. and a temperature sensor (not shown) for detecting the internal temperature, and controls energization to the heater according to the detected value of the temperature sensor. Thus, the temperature in the vacuum chamber 1150 can be adjusted.
- the injection device 1100 has a main agent tank 1101 for storing the main agent 130A of the silicone resin 130, and a curing agent tank 1111 for storing the curing agent 130B.
- the main agent 130A and the curing agent 130B are mixed together in the switch module 102. inject.
- the main agent tank 1101 includes a heater 1102 and a band heater 1103 for heating the main agent 130A, and includes an agitation mechanism 1105 including an agitation blade 1104.
- the main agent tank 1101 is agitated by driving the agitation mechanism 1105 by a motor (not shown).
- the curing agent tank 1111 includes a heater 1112 and a band heater 1113 for heating the curing agent 130B.
- the curing agent tank 1111 includes an agitation mechanism 1115 provided with an agitation blade 1114, and the agitation mechanism 1115 is driven by a motor (not shown) to agitate the curing agent 130B.
- the injection device 1100 includes heaters 1102 and 1112, band heaters 1103 and 1113, and other various heaters. However, when materials that do not require heating are used as the main agent 130A and the curing agent 130B, Since there is no need to provide a heater, a configuration without a heater may be employed.
- the main agent 130A in the main agent tank 1101 is supplied to the quantitative mixing unit 1130 via the main agent supply pipe 1121 provided with a heater (not shown).
- the curing agent 130B in the curing agent tank 1111 is supplied to the quantitative mixing unit 1130 through a curing agent supply pipe 1123 equipped with a heater (not shown).
- the quantitative mixing unit 1130 mixes the main agent 130A and the curing agent 130B at a preset mixing ratio, and sends out the mixed silicone resin 130 while measuring.
- the silicone resin 130 mixed by the quantitative mixing unit 1130 is sent to the injection nozzle 1152 of the vacuum chamber 1150 through the mixed resin supply pipe 1125 and is injected from the injection nozzle 1152 to the switch module 102.
- the amount of the silicone resin 130 injected from the injection nozzle 1152 into the switch module 102 can be measured by the quantitative mixing unit 1130. For this reason, the set amount of silicone resin 130 can be injected into the switch module 102 by closing the valve 1151 based on the measurement value of the quantitative mixing unit 1130.
- the mixed resin supply pipe 1125 branches and is connected to each of the plurality of injection nozzles 1152, and a valve 1151 is provided for each injection nozzle 1152 in the branched pipe line. The valve 1151 is closed when the degree of vacuum in the vacuum chamber 1150 is increased. Thereby, for example, after the silicone resin 130 is injected, the vacuum chamber 1150 can be sufficiently decompressed by the vacuum pump 1135.
- a vacuum pump (not shown) is connected to the main agent tank 1101 and the curing agent tank 1111, and the inside of the tank can be depressurized by this vacuum pump. Accordingly, the entire system in which the main agent 130A, the curing agent 130B, and the mixed silicone resin 130 flow can be decompressed and injected into the vacuum chamber 1150 in a reduced pressure state (vacuum injection). By performing this vacuum injection, the silicone resin 130 can be injected into the switch module 102 in a state where bubbles are not easily generated.
- the above-described manufacturing process of the switching device 101 can be performed using the injection device 1100 shown in FIG.
- the switch module 102 is accommodated in the vacuum chamber 1150, the valve 1151 is opened, the mixed silicone resin 130 is supplied to the injection nozzle 1152, and the silicone resin 130 is injected into the switch module 102 from above by the injection nozzle 1152. Is done.
- the valve 1136 is opened, and the atmospheric pressure in the vacuum chamber 1150 is reduced to a pressure specified in advance by the vacuum pump 1135. After a set amount of silicone resin 130 is injected from the injection nozzle 1152 into the switch module 102, the valve 1151 is closed to complete the injection process.
- the inside of the vacuum chamber 1150 is decompressed by the vacuum pump 1135 until the degree of vacuum specified in advance is maintained, and this degree of vacuum is maintained for a preset time. Thereafter, a curing step is performed.
- the temperature in the vacuum chamber 1150 is adjusted to a set temperature by a heater (not shown) provided in the vacuum chamber 1150.
- the degree of vacuum in the vacuum chamber 1150 is adjusted by the vacuum pump 1135, for example, when the inside of the vacuum chamber 1150 is set to normal pressure, the vacuum pump 1135 is stopped and the valve 1136 is closed, and a leak valve (not shown) is opened. Accordingly, the atmospheric pressure in the vacuum chamber 1150 is gradually returned to atmospheric pressure.
- the switching device 101 joins the wire 119 to the semiconductor element 111 and the external terminal 114 as electronic components by wire bonding, and the wire 119 is joined.
- the switching device 101 in which the bonded surfaces 121 and 122 are covered with the sealing silicone resin 130, the semiconductor element 111 is accommodated in the case 110, and a part of the wire 119 is contained in the silicone resin 130 in the case 110.
- the silicone resin 130 having a predetermined height exposed from the upper surface of the resin is injected, and the case 110 is left under reduced pressure to raise the liquid level of the silicone resin 130, and the wire 119 exposed above the silicone resin 130 is exposed.
- the wire 119 is obtained by coating with a silicone resin 130.
- the method for manufacturing the switching device 101 described above includes an injection step of injecting the silicone resin 130 into the case 110 and a pressure reduction step of placing the case 110 into which the silicone resin 130 has been injected in the injection step under reduced pressure.
- the silicone resin 130 is injected in an amount such that at least a part of the metal wire is exposed from the upper surface of the silicone resin 130, and in the pressure reduction step, the liquid level of the silicone resin 130 is raised by pressure reduction.
- the metal wire exposed above the silicone resin 130 in the process is covered with the silicone resin 130.
- an electronic component to which a metal wire is bonded by wire bonding is accommodated in the case 110, the bonding surfaces 121 and 122 are covered with the silicone resin 130 injected into the case 110, and the metal wire is made of silicone. It is possible to manufacture the switching device 101 that is exposed above the resin 130 and hardly transmits the vibration of the silicone resin 130 to the metal wire.
- the silicone resin 130 is exposed on the silicone resin 130 without pouring the silicone resin 130 into the case 110 to a height at which the entire metal wire is immersed. The portion can be covered with the silicone resin 130.
- the bonding surfaces 121 and 122 of the switching device 101 are covered with the silicone resin 130, and the metal wire is exposed on the silicone resin 130 to thereby expose the silicone resin 130. Can be prevented from being transmitted to the wire, and the metal wire can be covered with the silicone resin 130. Further, in the decompression step, defoaming for removing bubbles and moisture in the case 110 can be performed while the case 110 into which the silicone resin 130 is injected is placed under reduced pressure, so that the number of steps can be reduced. In the switching device 101, the bonding surfaces 121 and 122 are covered and protected by the silicone resin 130, and the vibration of the silicone resin 130 is not easily transmitted to the wire 119. Furthermore, since the wire 119 is covered with the silicone resin 130, the corrosion resistance of the wire 119 is enhanced and insulated.
- both ends of the wire 119 are bonded to the bonding surfaces 121 and 122 to form an upward convex shape, and at least the top of the wire 119 is more than the injected silicone resin 130 in the injection step. Since the silicone resin 130 is injected to such a height that all the bonding surfaces 121 and 122 are covered with the injected silicone resin 130, the bonding surfaces 121 and 122 can be more reliably covered with the silicone resin 130. .
- the configuration in which the silicone resin 130 injected by the injection nozzle 1152 is blown up in the decompression process to adhere the silicone resin 130 to the entire wire 119 is described as an example.
- the invention is not limited to this, and when the silicone resin 130 flows down to the switch module 102, the silicone resin 130 can be attached to the entire wire 119.
- this case will be described as a second exemplary embodiment.
- FIG. 6 is an explanatory view of a method of manufacturing a switching device according to a second exemplary embodiment to which the present invention is applied, and particularly shows an injection process.
- FIG. 7 is a cross-sectional view of the main part showing the configuration of the switching device 101A manufactured by the manufacturing method shown in FIG.
- symbol is attached
- a moving mechanism for moving the injection nozzle 1152 for flowing the silicone resin 130 from above the switch module 102 in the horizontal direction on the switch module 102 is provided, and the injection nozzle 1152 can be moved.
- the moving direction of the injection nozzle 1152 may be one direction, but is preferably two or more directions, and is preferably movable to any position on the switch module 102.
- the injection nozzle 1152 is moved on the switch module 102 while flowing the silicone resin 130 down to the switch module 102 as indicated by an arrow in the drawing, whereby the substrate 115 and the semiconductor element 111 disposed in the case 110 are moved.
- the silicone resin 130 falls on the surface. Further, the silicone resin 130 falls on the wire 119 not only on the bonding surfaces 121 and 122 but also on the whole including the top.
- a nozzle head 1154 for dispersing and flowing the silicone resin 130 is attached to the tip of the injection nozzle 1152.
- the silicone resin 130 can be flowed down to a wider area in a band shape or a bundle shape. Accordingly, it is possible to adjust the range in which the injection nozzle 1152 is moved, for example, to allow the silicone resin 130 to flow down so that the silicone resin 130 is spread over the entire inside of the housing 113 without a gap.
- the silicone resin 130 is also applied to the lower member. Can be fully distributed.
- the moving path of the injection nozzle 1152 may be set so that the nozzle head 1154 passes through the inside of the housing 113 without leaking, but for example, a limited place such as on the wire 119 or the bonding surfaces 121 and 122.
- the path may be set so that the nozzle head 1154 passes a plurality of times.
- the silicone resin 130 is injected into the switch module 102 by the injection process shown in FIG. 6, when the decompression process and the curing process are executed under the same conditions as in the first exemplary embodiment, the wire 119, the bonding surface
- the silicone resin 130 attached to the parts 121 and 122 and other components inside the housing 113 is cured, and the switching device 101A is obtained. Dispersing the silicone resin 130 with the nozzle head 1154 makes it easier for air bubbles to enter the silicone resin 130, but defoaming is performed by performing a decompression step thereafter, so there is no demerit from using the nozzle head 1154. .
- the entire surface of a part of the semiconductor element 111, the substrate 115, and the external terminal 114 housed in the case 110 is covered with the silicone resin 130, and the wire 119 is entirely covered with the resin film. 131 is formed.
- the amount of the silicone resin 130 injected into the case 110 is desirably at least high enough to expose a part of the wire 119. This is to prevent the vibration of the silicone resin 130 from being easily transmitted to the wire 119 in the switching device 101A after the silicone resin 130 is cured.
- the silicone resin 130 is injected only to a height that covers the substrate 115 fixed to the bottom of the case 110.
- the liquid level of the silicone resin 130 is very low compared to the top of the wire 119, and is lower than the bonding surfaces 121 and 122. For this reason, when vibration is applied to the switching device 101A, there is no possibility that the gel-like silicone resin 130 vibrates and applies a load to the wire 119, or that this vibration load causes disconnection.
- the manufacturing method of the second exemplary embodiment includes an injection process in which the silicone resin 130 is caused to flow down and injected into the switch module 102 by the injection nozzle 1152, and in this injection process, the injection nozzle 1152 is connected to the wire 119 or the like. Since the silicone resin 130 is caused to flow from above to each part accommodated in the case 110, the bonding surfaces 121 and 122 of the switching device 101A are covered with the silicone resin 130. In addition, the wire 119 can be exposed on the silicone resin 130 to prevent transmission of vibration to the wire 119, and the wire 119 can be covered with the resin film 131 to improve insulation and corrosion resistance.
- the amount of the silicone resin 130 injected into the case 110 can be small, the cost can be reduced by reducing the amount of material used, the defoaming time in the decompression process and the curing time of the silicone resin 130 in the curing process can be shortened. The accompanying lead time can be shortened.
- the amount of the silicone resin 130 injected into the case 110 is not necessarily limited to a small amount as shown in FIG. 7.
- Silicone resin 130 may be injected up to a height LH at which 121 and 122 are completely immersed in silicone resin 130.
- the bonding surfaces 121 and 122 are more reliably covered with the silicone resin 130, and the entire wire 119 is further covered with the silicone resin 130.
- the top of the wire 119 and the vicinity thereof are exposed on the silicone resin 130. Therefore, when vibration is applied to the switching device 101A, the gel-like silicone resin 130 vibrates and the wire is exposed. There is no possibility that a load is applied to 119 or disconnection is caused by this vibration load.
- FIG. 8 to 10 are explanatory views showing a method of manufacturing the switching device 1 according to the third exemplary embodiment of the present invention.
- FIG. 8 is a cross-sectional view of the main part of the switch module 1A after the injection process.
- FIG. 9 is a cross-sectional view of the main part of the switch module 1A in the decompression step.
- FIG. 10 is a cross-sectional view of the main part of the switch module 1A in the detection process.
- FIG. 11 is principal part sectional drawing which shows the structure of the switching apparatus 1 manufactured by the manufacturing method which concerns on a 3rd typical Example.
- the switching device 1 (FIG. 11) according to the third exemplary embodiment is configured by accommodating a substrate 15 on which a semiconductor element 11 is mounted in a case 10 having an upper surface opened.
- the semiconductor element 11 as an electronic component is a switching element for supplying power corresponding to a large current, such as an IGBT, a power MOSFET, a thyristor, or a diode.
- the substrate 15 is a substrate having a three-layer structure in which an insulating substrate 15C is sandwiched between the upper surface insulating substrate 15A and the lower surface insulating substrate 15B with a brazing material or the like, and the upper surface insulating substrate 15A and the lower surface insulating substrate 15B include For example, a circuit pattern constituting a power supply circuit is formed.
- the semiconductor element 11 is electrically connected to a pattern formed on the upper surface insulating substrate 15A and the lower surface insulating substrate 15B by solder 18.
- the case 10 includes a base substrate 12 that forms the bottom surface thereof, and a housing 13 that is fixed to the peripheral edge of the base substrate 12 and forms a side wall.
- the cross-sectional shape of the housing 13 may be a circle, a square or other polygons.
- the housing 13 has a substantially cylindrical shape as an example.
- the housing 13 and the base substrate 12 are joined by an adhesive or the like so that the liquid does not leak.
- the case 10 is filled with the liquid, the liquid can be stored without leakage.
- the lower portion of the substrate 15 is fixed by an insulating bonding material 17.
- the housing 13 is provided with an external terminal 14 that protrudes to the outside of the case 10.
- the external terminal 14 is a metal terminal that penetrates the housing 13 so as to straddle the inside and the outside of the case 10 and is connected to a circuit outside the case 10.
- the external terminal 14 is provided to connect the semiconductor element 11 accommodated in the case 10 to a circuit outside the case 10.
- the external terminal 14 and the semiconductor element 11 are connected to the wire 19 ( Electrically connected by metal wire).
- the wire 19 is a metal wire formed by wire bonding, and specifically, is a wire made of gold or aluminum having a thickness of several tens to several hundreds of ⁇ m.
- One end of the wire 19 is joined to a metal part of an external connection terminal (not shown) provided in the semiconductor element 11 by a load and ultrasonic waves, and the other end of the wire 19 is joined to the external terminal 14 in the same manner.
- the gap is conducted through the wire 19.
- a portion (surface) where the wire 19 is bonded to the semiconductor element 11 is referred to as a bonding surface 21
- a portion (surface) where the wire 19 is bonded to the external terminal 14 is referred to as a bonding surface 22.
- the wire 19 is formed by wire bonding, the metal on the bonding surfaces 21 and 22 is exposed to the atmosphere together with the wire 19. Further, the wire 19 is formed such that both ends joined at the bonding surfaces 21 and 22 are the lowest, and the central portion is convex upward. (The highest portion of the wire 19 is located between both ends bonded to the bonding surfaces 21 and 22.)
- the semiconductor element 11 is accommodated in the case 10, and the substrate 15 is fixed by the first bonding material 17.
- a wire 19 is formed by wire bonding between the semiconductor element 11 bonded to the base substrate 12 and mounted on the substrate 15 and the external terminal 14 to configure the switch module 1A. Silicone resin is injected into the switch module 1A, and the bonding surfaces 21 and 22 and the wire 19 are covered to manufacture the switching device 1 as an electronic device.
- the method for manufacturing the switching device 1 from the switch module 1A includes the following four steps. 1. An injection step of injecting a silicone resin into the switch module 1A. 2. A depressurization step of placing the switch module 1A injected with silicone resin under reduced pressure. 3. A detection step of detecting that the wire 19 is covered with a silicone resin. 4). A curing process for curing the silicone resin.
- the silicone resin injected into the case 10 is, for example, a two-component resin in which a main agent is mixed with a curing agent, has a predetermined viscosity and fluidity at the time of injection, and then cures under predetermined curing conditions. It becomes gel or solid.
- curing conditions for the silicone resin 30 include irradiation with light (ultraviolet rays) and heating. Typical curing conditions for thermosetting silicone resins with curing conditions of temperature and time are: normal temperature (20 ° C. ⁇ 15 ° C. according to JIS standards) to 150 ° C., time tens of minutes to 3 hours Degree.
- a thermosetting silicone resin 30 (FIGS. 9 to 12) that cures at 80 ° C. for 1 hour will be described.
- FIG. 8 shows a state of the switch module 1A after the silicone resin 30 is injected into the case 10 in the injection process.
- a two-part resin composed of a main agent and a curing agent is mixed to prepare a fluidized silicone resin 30, and an injection device (not shown) for discharging the silicone resin 30 from an injection nozzle (not shown). Abbreviation) is used.
- the silicone resin 30 is injected into the case 10 of the switch module 1A from above by the injection nozzle of the injection device.
- the injection amount of the silicone resin 30 is sufficiently lower than the uppermost portion (wire top) of the wire 19 and the height at which the metal of the bonding surfaces 21 and 22 is immersed in the silicone resin 30. is there.
- the silicone resin 30 When the silicone resin 30 is injected to the height shown in FIG. 8, the corrosion resistance and moisture resistance of the bonding surfaces 21 and 22 are ensured, whereas the silicone resin 30 is compared with the case where the wires 19 are all submerged in the silicone resin 30. Even when 30 vibrates, there is no possibility that this vibration is transmitted to the wire 19 and breaks the wire 19 or the bonding surfaces 21 and 22.
- a resin receiving portion 41 is provided on the inner surface of the housing 13 constituting the case 10.
- the resin receiving portion 41 is a protruding portion that protrudes from the housing 13 into the internal space of the case 10, and has a resin reservoir 42 that is a recess capable of storing the silicone resin 30.
- the height of the edge of the resin reservoir 42 is substantially the same height as the wire top (in the convex wire 19 whose center is upward as described above) or higher than the wire top. .
- the amount of the silicone resin 30 to be injected in the injection step is determined using the height of the liquid level after the injection as an index. That is, as described above, the injection amount of the silicone resin 30 is determined so that the bonding surfaces 21 and 22 are submerged and a height at which a part of the wire 19 is exposed. And as shown in FIG. 8, the lower end of the resin receiving part 41 which protrudes from the housing 13 is the same height as the liquid level of the silicone resin 30 inject
- the injection step may be performed under normal pressure conditions, or may be performed under reduced pressure conditions. That is, when the silicone resin 30 is injected into the switch module 1A, the entire switch module 1A and a nozzle (not shown) for injecting the silicone resin 30 are accommodated in a reduced pressure chamber (not shown), and the inside of the reduced pressure chamber is decompressed. In this state, the silicone resin 30 may be injected (so-called vacuum injection). When vacuum injection is performed, there is an advantage that the silicone resin 30 can be injected quickly.
- the switch module 1A is left for a predetermined time in a decompression environment. Specifically, the switch module 1A in which the silicone resin 30 is injected is housed in a vacuum chamber that can be sealed, and the state in which the vacuum in the vacuum chamber is maintained at 600 Pa to 1000 Pa continues for about 10 minutes to 1 hour. Is done. If the above-described vacuum injection is performed in the injection process, the process proceeds to the pressure reduction process after the injection of the silicone resin 30 is completed, and the switch module 1A is continuously left in a pressure reduction environment. In this case, the standing time is about 10 minutes to 1 hour. In this case, the degree of vacuum in the chamber containing the switch module 1A in the decompression step may be higher than that in the injection step (lower pressure), or may be the same as that in the injection step.
- the time for leaving the switch module 1A in the depressurization step is sufficient as long as it can be sufficiently degassed. Therefore, the viscosity of the silicone resin 30, the amount of air contained in the components inside the case 10 including the silicone resin 30, the vacuum in the depressurization step It may be determined in consideration of the speed until the target vacuum degree is reached from the normal pressure in the pressure reduction process. In general, the higher the degree of vacuum and the longer the time, the more defoaming can be ensured. Therefore, the degree of vacuum and time may be determined in consideration of the state of defoaming and productivity.
- the air that has entered the gap between the semiconductor element 11 in the switch module 1 ⁇ / b> A and between the substrate 15 and the base substrate 12 expands as the decompression occurs, and becomes air bubbles in the silicone resin 30. Float up.
- the expanded bubbles float from the vicinity of the bottom of the case 10 into the silicone resin 30, so that the silicone resin 30 foams and blows up as a whole, and the liquid level of the silicone resin 30 rises as shown in FIG. 9.
- the liquid level of the silicone resin 30 exceeds the height of the wire top, and the top portion of the wire 19 exposed on the silicone resin 30 in the injection process is submerged in the silicone resin 30.
- the liquid level of the silicone resin 30 exceeds the height of the uppermost portion of the wire 19, so that the silicone resin 30 flows into the resin reservoir 42 beyond the edge of the resin reservoir 42.
- the silicone resin 30 When the time elapses with the switch module 1A placed under a reduced pressure, the air present in the gap in the case 10 escapes from the silicone resin 30 and the bubbles blow up. Thereby, the liquid level of the silicone resin 30 falls and returns to a height corresponding to the amount injected in the injection step.
- the silicone resin 30 since the silicone resin 30 has a high viscosity, the silicone resin 30 adhered to the surface once immersed in the silicone resin 30 even after the liquid level of the silicone resin 30 returned to the injected height. It remains as a film. It is clear that the coating remains for several hours to several tens of hours based on the viscosity of a general silicone resin. Therefore, the silicone resin 30 is blown up to the height of the wire top in the decompression step, so that a film of the silicone resin 30 is formed on the entire wire 19.
- the height at which the silicone resin 30 blows up in the decompression process is the target of the viscosity of the silicone resin 30, the amount of air present in the components inside the case 10 including the silicone resin 30, the degree of vacuum in the decompression process, and the normal pressure in the decompression process It depends on the speed of reaching the degree of vacuum. Further, the air present in the gaps between the component parts varies depending on the size of the substrate 15, the number of elements mounted on the substrate 15, the number of wires 19, and the like. For this reason, in consideration of these, the amount of the silicone resin 30 to be injected in the injection step, that is, the height of the liquid level is determined so that the silicone resin 30 is blown up to the position of the wire top in the decompression step.
- the detection step is performed to confirm that the liquid level of the silicone resin 30 has risen to the required height.
- This detection step may be performed after the decompression of the decompression chamber containing the switch module 1A is released, or may be performed in a state where the switch module 1A is under decompression, that is, before the degree of vacuum in the decompression chamber is reduced. Good.
- the inspection light L is irradiated from above the case 10 by an inspection light source (not shown) including a laser light source, an LED light source, and the like, and the inspection light L is reflected at the resin reservoir 42.
- the reflected light is received by a light receiving unit (not shown), and it is determined whether or not the silicone resin 30 is accumulated in the resin reservoir 42 based on the amount of received light, the wavelength of the received reflected light, or the like.
- reflected light when the inspection light L is irradiated on the bottom surface 42A Prior to the detection step, reflected light when the inspection light L is irradiated on the bottom surface 42A (FIG.
- the wavelength of the inspection light L may be any of the visible region, the ultraviolet region, and the infrared region.
- the silicone resin 30 is added to the resin reservoir 42. Since the amount of reflected light is remarkably reduced when the water is accumulated, it becomes easy to reliably determine the presence or absence of the silicone resin 30. That is, the silicone resin 30 can be reliably detected by setting the wavelength of the inspection light L to the wavelength of the absorption peak existing in the absorption spectrum of the silicone resin 30.
- the bottom surface 42A is preferably in a state of reflecting the inspection light L with a high reflectance.
- the inspection light L reflected by the silicone resin 30 with high reflectance can be used. In this case, if the bottom surface 42A hardly reflects the inspection light L, the difference in reflected light is significant. Therefore, the silicone resin 30 can be detected more reliably.
- the detection step it is possible to detect that the silicone resin 30 is accumulated in the resin reservoir 42 by irradiating the inspection light L from above the switch module 1A. Based on the detection result, the wire 19 It can be determined whether or not the silicone resin 30 has adhered to the entirety. When it is determined that the silicone resin 30 has adhered to the entire wire 19 in this detection process, a curing process is performed.
- the silicone resin 30 injected into the switch module 1A is mixed with a curing agent.
- the switch module 1A is left for a predetermined time in an environment that satisfies the curing condition of the silicone resin 30.
- a thermosetting silicone resin is used
- the switch module 1A is left in a state where a temperature of a predetermined temperature or higher (room temperature to 150 ° C.) is maintained.
- a photocurable silicone resin when a photocurable silicone resin is used, light is irradiated by an ultraviolet lamp (not shown) or the like.
- the switch module 1A is left at 80 ° C. for 1 hour until the silicone resin 30 is cured.
- the coating of the silicone resin 30 formed on the wire 19 is held for a long time due to the viscosity of the silicone resin 30, and thus becomes a gel or a solid in the curing step. For this reason, the wire 19 is coat
- the switch module 1A may be under reduced pressure conditions following the pressure reduction step, or the vacuum degree may be gradually reduced to normal pressure conditions, and after reaching normal pressure, the process proceeds to the curing step. Also good.
- FIG. 11 is a cross-sectional view of the main part showing the configuration of the switching device 1 manufactured by the above manufacturing method.
- the silicone resin 30 is filled to a height that covers both the bonding surfaces 21 and 22 and hardened in a gel state, and a part of the wire 19 protrudes above the silicone resin 30. Yes.
- the wire 19 is covered with a silicone resin 30 on the bonding surfaces 21 and 22. Further, the portion of the wire 19 that protrudes above the upper surface of the silicone resin 30 is covered with a resin coating 31 that is a thin film of the silicone resin 30 that is attached in the decompression step.
- the resin coating 31 is formed up to the wire top of the wire 19 can be easily confirmed based on whether or not the silicone resin 30 in the resin reservoir 42 is detected in the detection step. Therefore, when the liquid level of the silicone resin 30 does not rise to the wire top in the decompression step and the entire wire 19 is not covered with the silicone resin 30, this can be detected in the detection step. For this reason, a product defect can be reliably detected. Moreover, since the detection process is performed before the curing process, the switch module 1 ⁇ / b> A detected as defective can be made non-defective by attaching the silicone resin 30 to the wire 19.
- the wire 19 is bonded to the semiconductor element 11 by wire bonding, and the bonding surfaces 21 and 22 to which the wire 19 is bonded are provided. It is configured to be covered with a sealing silicone resin 30, and includes a case 10 that houses the semiconductor element 11 and into which the silicone resin 30 is injected. The resin receiving portion 41 into which the silicone resin 30 flows when the liquid level reaches above the wire 19 is provided, the semiconductor element 11 is accommodated in the case 10, and a part of the wire 19 is silicone resin in the case 10.
- the silicone resin 30 flows into the resin receiving portion 41. Since the silicone resin 30 that has flowed into the resin receiving portion 41 can be easily detected by an optical technique using the inspection light L, it can be easily confirmed that the wire 19 is covered with the silicone resin 30 to the top.
- the wire 19 is coated with the silicone resin 30 to improve the corrosion resistance of the wire 19 and to protect the insulation of the wire 19 without introducing new equipment including a suction nozzle or increasing the size of the switching device 1. It is possible to provide the switching device 1 that can be easily manufactured and can easily confirm that the wire 19 is completely covered.
- the wire 19 is covered with the silicone resin 30 by raising the liquid level of the silicone resin 30 in the pressure reduction step, Since the detection process detects that the liquid level of the silicone resin 30 has risen to a sufficient height, it is possible to easily check that the wire 19 is covered with the silicone resin 30 and that the wire 19 is further covered. For this reason, the covering of the wire 19 is not left incomplete, and the switching device 1 can be manufactured quickly and with a high yield.
- the resin receiving portion 41 has a resin reservoir 42 exposed to the space inside the case 10, and the edge of the resin reservoir 42 is located at the same height as the upper end of the wire 19.
- the silicone resin 30 reliably flows into the resin reservoir 42 of the resin receiving portion 41 and is stored. For this reason, by detecting the silicone resin 30 accumulated in the resin reservoir 42 after the rise in the liquid level of the silicone resin 30 is settled, it is easy and prompt that the wire 19 is covered with the silicone resin 30 to the upper part. Can be detected.
- the silicone resin 30 of the resin reservoir 42 can be detected continuously and at high speed for a large number of switching devices 1. It is also possible to detect by irradiating the inspection light L in the decompression chamber.
- FIG. 12 is a cross-sectional view of the main part showing the configuration of the switching device 2 according to the fourth exemplary embodiment to which the present invention is applied.
- the switching device 2 accommodates the substrate 15 on which the semiconductor element 11 is mounted in the case 24, and the external terminal 14 provided in the case 24 and the semiconductor element 11 is connected by a wire 19.
- the case 24 included in the switching device 2 is configured by joining a housing 23 to the peripheral edge of the base substrate 12.
- the cross-sectional shape of the housing 23 may be a circle as well as the housing 13, and may be a square or other polygons.
- the housing 23 and the base substrate 12 are joined by an adhesive or the like so that the liquid does not leak.
- the case 24 is filled with the liquid, the liquid can be stored without leakage.
- a part of the housing 23 is cut out to form a resin receiving portion 45.
- the resin receiving portion 45 is formed by cutting out the upper end portion of the inner surface of the housing 23 at a part on the circumference, and a resin reservoir 46 for storing the silicone resin 30 is formed at the bottom portion.
- the resin reservoir 46 is a recess exposed in the internal space of the case 24, and the height of the edge of the resin reservoir 46 is the wire top of the wire 19 (as described above, in the convex wire 19 with the central portion facing upward, It is almost the same height as the convex top) or higher than the wire top.
- the switching device 2 shown in FIG. 12 is manufactured by the same manufacturing method as the switching device 1 according to the third exemplary embodiment. That is, an injection process for injecting the silicone resin 30 into the case 24 to a predetermined height, a decompression process for raising the liquid level of the silicone resin 30 by leaving it under reduced pressure after the injection process, and a depressurization process for the silicone resin 30 in the decompression process. It is a detection process for detecting that the liquid level has risen, and a curing process for curing the silicone resin 30.
- the silicone resin 30 injected in the injection step is the same as that in the third exemplary embodiment.
- the injection amount of the silicone resin 30 is such that the bonding surfaces 21 and 22 are immersed in the silicone resin 30 and at least one of the wires 19 is inserted.
- the silicone resin 30 is pushed up together with bubbles in the case 24 placed under reduced pressure, and the liquid level of the silicone resin 30 rises beyond the height of the wire top of the wire 19. At this time, the silicone resin 30 adheres to the entire wire 19, while the silicone resin 30 flows into the resin reservoir 46 in the resin receiving portion 45. After that, the detection process is performed while being left under reduced pressure or after releasing the reduced pressure.
- FIG. 13 is an explanatory diagram of an inspection process in the manufacturing process of the switching device 2.
- the inspection light L is irradiated from above the case 24 toward the resin reservoir 46 by a light source (not shown). Since the inspection light L is reflected by the bottom surface of the resin reservoir 46 or the silicone resin 30 accumulated in the resin reservoir 46, the silicone resin 30 accumulated in the resin reservoir 46 can be detected by receiving the reflected light by a light receiving unit (not shown). .
- the inspection light L is the same as the inspection light L described in the third exemplary embodiment, and the inspection light L has a high reflectance at the bottom surface of the resin reservoir 46 and is absorbed by the silicone resin 30 in the inspection light L. Light having an easy wavelength may be used, or the reflectance of the bottom surface of the resin reservoir 46 may be lowered, and the wavelength of the inspection light L may be light having a high reflectance on the surface of the silicone resin 30.
- the switching device 2 includes the case 24 configured by joining the housing 23 to the base substrate 12, and a part of the inner surface of the case 24 is cut away to form the resin receiving portion 45.
- a resin reservoir 46 capable of storing the silicone resin 30 is formed in the receiving portion 45.
- the silicone resin 30 is stored in the resin reservoir 46. Flows in. Since the silicone resin 30 that has flowed into the resin reservoir 46 can be easily detected by an optical technique in which the inspection light L is irradiated in the detection process, the entire wire 19 that is above the silicone resin 30 is removed in the decompression process. It can be easily confirmed whether or not the silicone resin 30 has adhered.
- the resin receiving portion 45 is formed by cutting out a part of the housing 23, there is no portion protruding inside the case 24, and the step of arranging the substrate 15 inside the case 24, In the step of forming the wire 19, the resin receiving portion 45 does not get in the way. For this reason, it can be easily detected that the silicone resin 30 has adhered to the wire 19 without affecting the arrangement of the components in the case 24 and other processes.
- FIG. 14 is a cross-sectional view of the main part showing the configuration of the switching device 3 according to the fifth exemplary embodiment to which the present invention is applied.
- the switching device 3 accommodates the substrate 15 on which the semiconductor element 11 is mounted in the case 26, and the external terminal 14 provided in the case 26 and the semiconductor element 11 is connected by a wire 19.
- the case 26 provided in the switching device 3 is configured by joining the housing 25 to the peripheral edge of the base substrate 12.
- the cross-sectional shape of the housing 25 may be a circle as in the case of the housing 13, or may be a square or other polygons.
- the housing 25 and the base substrate 12 are joined by an adhesive or the like so that the liquid does not leak.
- the case 26 is filled with the liquid, the liquid can be stored without leakage.
- a through hole 48 is formed in the housing 25 so as to penetrate the inside and outside of the case 26.
- the height of the lower end of the through-hole 48 is substantially the same height as the wire top of the wire 19 (as described above, the convex top portion of the convex wire 19 whose center is upward) or higher than the wire top. It has become.
- a resin receiving portion 49 is provided on the outer surface of the housing 25 below the through hole 48.
- the resin receiving portion 49 has a resin reservoir 50 as a recess for storing the liquid flowing out from the through hole 48.
- the height position of the resin reservoir 50 may be lower than the through hole 48, but the height of the edge of the resin reservoir 50 is preferably above the through hole 48 so that the liquid does not overflow outside the resin receiving portion 49. .
- the switching device 3 shown in FIG. 14 is manufactured by the same manufacturing method as the switching device 1 according to the third exemplary embodiment. That is, an injection process for injecting the silicone resin 30 into the case 26 to a predetermined height, a decompression process for raising the liquid level of the silicone resin 30 by leaving it under reduced pressure after the injection process, and a depressurization process. It is a detection process for detecting that the liquid level has risen, and a curing process for curing the silicone resin 30.
- the silicone resin 30 injected in the injection step is the same as that in the third exemplary embodiment.
- the injection amount of the silicone resin 30 is such that the bonding surfaces 21 and 22 are immersed in the silicone resin 30 and at least one of the wires 19 is inserted. This is the amount that the part is exposed from the liquid surface of the silicone resin 30. In a state in which the silicone resin 30 is injected up to this height, the silicone resin 30 does not reach the through hole 48 and therefore the silicone resin 30 does not flow out of the through hole 48.
- the silicone resin 30 is pushed up together with bubbles in the case 26 placed under reduced pressure, and the liquid level of the silicone resin 30 rises beyond the height of the wire top of the wire 19.
- the silicone resin 30 adheres to the entirety of the wire 19, while the liquid level of the silicone resin 30 reaches a position higher than the through hole 48 formed in the housing 25, so that the silicone from the through hole 48 to the outside of the case 26.
- the resin 30 flows out, and the silicone resin 30 accumulates in the resin reservoir 50. After that, the detection process is performed while being left under reduced pressure or after releasing the reduced pressure.
- FIG. 15 is an explanatory diagram of an inspection process in the manufacturing process of the switching device 3.
- the inspection light L is irradiated from above the case 26 toward the resin reservoir 50 by a light source (not shown). Since the inspection light L is reflected by the bottom surface of the resin reservoir 50 or the silicone resin 30 accumulated in the resin reservoir 50, the silicone resin 30 accumulated in the resin reservoir 50 can be detected by receiving the reflected light by a light receiving unit (not shown). .
- the inspection light L is the same as the inspection light L described in the third exemplary embodiment, and the inspection light L has a high reflectance at the bottom surface of the resin reservoir 50 and is absorbed by the silicone resin 30 in the inspection light L. Light having an easy wavelength may be used, or the reflectance of the bottom surface of the resin reservoir 50 may be lowered, and the wavelength of the inspection light L may be changed to light having a high reflectance on the surface of the silicone resin 30.
- the switching device 3 includes the case 26 configured by joining the housing 25 to the base substrate 12, and the through hole 48 is formed in the housing 25 configuring the side surface of the case 26, so that the outer surface of the case 26 is formed.
- the resin reservoir 50 capable of storing the silicone resin 30 is formed below the through-hole 48, and when the liquid level of the silicone resin 30 rises to the height of the wire top of the wire 19 in the decompression process, the resin reservoir 50 passes through the through-hole 48. As a result, the silicone resin 30 flows into the resin reservoir 50.
- the silicone resin 30 that has flowed into the resin reservoir 50 can be easily detected by an optical technique in which the inspection light L is irradiated in the detection process, the entire wire 19 that is above the silicone resin 30 is removed in the decompression process. It can be easily confirmed whether or not the silicone resin 30 has adhered.
- the resin receiving portion 49 is provided outside the case 26, and the silicone resin 30 flows out through the through hole 48 into the resin reservoir 50 of the resin receiving portion 49, so that the portion protruding into the case 26 In the process of arranging the substrate 15 in the case 26 and the process of forming the wire 19, the resin receiving portion 49 does not get in the way. For this reason, it can be easily detected that the silicone resin 30 has adhered to the wire 19 without affecting the arrangement of the components in the case 26 or other processes. Further, since it is not necessary to secure a space for providing the resin receiving portion 49 in the case 26, the arrangement of the respective portions in the case 26 is not limited due to the convenience of the detection process, and the degree of freedom of arrangement in the case 26 is impaired. There is no advantage.
- FIG. 16 is a cross-sectional view of the main part showing the configuration of the switching device 4 according to the sixth exemplary embodiment to which the present invention is applied.
- the switching device 4 accommodates the substrate 15 on which the semiconductor element 11 is mounted in the case 28, and the external terminal 14 provided in the case 28 and the semiconductor element 11 is connected by a wire 19.
- the case 28 included in the switching device 4 is configured by joining a housing 27 to the peripheral edge of the base substrate 12.
- the cross-sectional shape of the housing 27 may be a circle, a square, or other polygonal shape like the housing 13.
- the housing 27 and the base substrate 12 are joined by an adhesive or the like so that the liquid does not leak. When the liquid is filled in the case 28, the liquid can be stored without leakage.
- a part of the housing 27 is cut out to form a resin receiving portion 53.
- the resin receiving portion 53 is a through hole that is formed by cutting out the upper portion of the housing 27 and penetrates into and out of the case 28.
- a bottom portion of the resin receiving portion 53 is a concave portion having a V-shaped cross section composed of two inclined surfaces 55 and 56, and this concave portion is a resin reservoir 54 in which the silicone resin 30 can be stored.
- the height of the lower end of the resin receiving portion 53 on the inner side of the case 28 is substantially the same height as the wire top of the wire 19 (as described above, the convex top portion of the convex wire 19 with the center portion facing upward). Or higher than the wire top.
- the upper end of the slope 55 located outside the case 28 is higher than the upper end of the slope 56 inside the case 28. For this reason, the silicone resin 30 that has flowed into the resin reservoir 54 does not easily overflow from the resin receiving portion 53 to the outside of the case 28.
- the switching device 4 shown in FIG. 16 is manufactured by the same manufacturing method as the switching device 1 according to the third typical embodiment. That is, an injection process for injecting the silicone resin 30 into the case 28 to a predetermined height, a decompression process for raising the liquid level of the silicone resin 30 by leaving it under reduced pressure after the injection process, and a depressurization process. It is a detection process for detecting that the liquid level has risen, and a curing process for curing the silicone resin 30.
- the silicone resin 30 injected in the injection step is the same as that in the third exemplary embodiment.
- the injection amount of the silicone resin 30 is such that the bonding surfaces 21 and 22 are immersed in the silicone resin 30 and at least one of the wires 19 is inserted. This is the amount that the part is exposed from the liquid surface of the silicone resin 30. In a state in which the silicone resin 30 is injected up to this height, the silicone resin 30 does not reach the upper end of the inclined surface 56, so that the silicone resin 30 does not flow into the resin reservoir 54.
- the silicone resin 30 is pushed up together with bubbles in the case 28 placed under reduced pressure, and the liquid level of the silicone resin 30 rises beyond the height of the wire top of the wire 19. At this time, the silicone resin 30 adheres to the entire wire 19, while the liquid level of the silicone resin 30 reaches a position higher than the upper end of the inclined surface 56, the silicone resin 30 flows into the resin receiving portion 53, and this silicone resin 30 accumulates in the resin reservoir 54. After that, the detection process is performed while being left under reduced pressure or after releasing the reduced pressure.
- FIG. 17 is an explanatory diagram of an inspection process in the manufacturing process of the switching device 4.
- the inspection light L is irradiated from the oblique upper side of the case 28 toward the resin reservoir 54 by a light source (not shown) in the direction from the inside to the outside of the case 28 in the example of FIG. Is done.
- the inspection light L strikes the inclined surface 55 and is reflected toward the incident side of the inspection light L, that is, the inside of the case 28.
- the silicone resin 30 is accumulated in the resin reservoir 54
- the inspection light L is reflected on the upper surface of the silicone resin 30. Since the silicone resin 30 has fluidity before the curing step, the upper surface of the silicone resin 30 is horizontal. Therefore, the inspection light L is reflected toward the outside of the housing 27 as shown in FIG.
- the silicone resin 30 accumulated in the resin reservoir 54 can be detected optically by detecting the direction of the reflected light of the inspection light L.
- This inspection light L is the same as the inspection light L described in the third exemplary embodiment.
- a light receiving portion (not shown) is arranged on the light source side that emits the inspection light L and the reflected light is received by this light receiving portion, the amount of received light is large when the silicone resin 30 is not accumulated in the resin reservoir 54, and the silicone resin 30.
- the amount of received light is reduced.
- the silicone resin 30 accumulated in the resin reservoir 54 can be detected by the difference in the amount of received light.
- the reflectance of the inspection light L on the inclined surface 55 is set to be high and the wavelength of the inspection light L is set to a wavelength that is easily absorbed by the silicone resin 30, the difference in the amount of received light becomes more remarkable.
- a light receiving portion (not shown) is provided in the direction of reflected light indicated by an arrow in FIG. 17 and the reflected light is received by this light receiving portion, the amount of received light is small when the silicone resin 30 is not accumulated in the resin reservoir 54, When the silicone resin 30 is accumulated, the amount of received light is increased.
- the switching device 4 includes the case 28 configured by joining the housing 27 to the base substrate 12, and the resin receiving portion 53 penetrating the housing 27 configuring the side surface of the case 28 is formed.
- the receiving portion 53 has a resin reservoir 54 having a V-shaped cross section constituted by two inclined surfaces 55 and 56.
- the silicone resin 30 flows into the resin reservoir 54. Since the silicone resin 30 that has flowed into the resin reservoir 54 can be easily detected by an optical technique in which the inspection light L is irradiated in the detection process, the entire wire 19 that is above the silicone resin 30 is removed in the decompression process. It can be easily confirmed whether or not the silicone resin 30 has adhered.
- the resin receiving portion 53 is formed in the housing 27 and the silicone resin 30 that has flowed into the resin receiving portion 53 is detected.
- the resin receiving portion 53 does not get in the way in the step of arranging the substrate 15 and the step of forming the wire 19. For this reason, it can be easily detected that the silicone resin 30 has adhered to the wire 19 without affecting the arrangement of the components in the case 28 or other processes.
- the arrangement of each portion in the case 28 is not limited due to the convenience of the detection process, and the degree of freedom of arrangement in the case 28 is impaired. There is no advantage.
- the amount of light received when the reflected light of the inspection light L is received at a fixed position differs depending on whether the silicone resin 30 is accumulated in the resin reservoir 54 or not. It can be detected.
- two-component silicone resins 30 and 130 are injected into the switch modules 6 and 102 as a synthetic resin that covers the bonding surfaces 21, 22, 121, and 122 and the wires 19 and 119.
- the synthetic resin injected into the case is not limited to the silicone resins 30 and 130. That is, any synthetic resin may be used as long as it has fluidity at the time of injection and then hardens into a gel or solid.
- the synthetic resin preferably has insulation and durability, and does not corrode the metals of the wires 19 and 119 and the bonding surfaces 21, 22, 121 and 122.
- covered the metal of the bonding surfaces 21, 22, 121, and 122, heat resistance, and water resistance is more preferable.
- a silicone resin but also an epoxy resin or the like can be used, which may be either photocuring or thermosetting, and may contain an additive or the like.
- a photo-curing resin if laser light is used as the inspection light L, the light is not diffused and irradiated to other than the resin reservoirs 42, 46, 50, 54 to be detected.
- a case where a silicone resin 30 or 130 is injected into a switch module including substrates 15 and 115 on which semiconductor elements 11 and 111 as electronic components are mounted to manufacture a switching device As described above, the present invention can also be applied to devices using various circuit elements such as capacitors and resistors or various integrated circuits as electronic components, and the shape of the case is arbitrary. You may use the case provided with the lid
- the present invention can be used in an electronic device including a semiconductor element and the like, and a method for manufacturing the electronic device.
- Switching device 1A switch module 10 case 11 semiconductor element (electronic component) 15 Substrate 19 Wire (metal wire) 21, 22 Bonding surface 30 Silicone resin (synthetic resin) 31 Resin coating 101, 101A Switching device (electronic device) 102 Switch module 110 Case 111 Semiconductor element (electronic component) 115 Substrate 119 Wire (Metal wire) 121, 122 Bonding surface 130 Silicone resin (synthetic resin) 131 Resin coating 1100 Injection device 1150 Vacuum chamber 1152 Injection nozzle
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Abstract
Description
なお、前記金属ワイヤーは、前記ケース内に前記金属ワイヤーの一部が合成樹脂の上面から露出する量の前記合成樹脂を注入し、前記ケースを減圧下に放置することによって前記合成樹脂の液面を上昇させ、前記合成樹脂よりも上に露出する前記金属ワイヤーに前記合成樹脂を付着させることにより、前記合成樹脂で被覆されてもよい。
図1は、本発明を適用した第1典型的実施例に係るスイッチモジュール102の概略構成を示す要部断面図である。この図1に示すスイッチモジュール102は、半導体素子111が実装された基板115を、上面が開口したケース110に収容して構成される。電子部品としての半導体素子111は、例えば、IGBT、パワーMOSFET、サイリスタ、ダイオード等の、大電流に対応した電源供給用のスイッチング素子である。基板115は、上面絶縁基板115A及び下面絶縁基板115Bの間に絶縁基板115Cを挟んでロウ材等により接合してなる3層構造の基板であり、上面絶縁基板115A及び下面絶縁基板115Bには、例えば電源供給回路を構成する回路パターンが形成されている。半導体素子111は、上面絶縁基板115A及び下面絶縁基板115Bに形成されたパターンに、はんだ118によって電気的に接続されている。
1.スイッチモジュール102にシリコーン樹脂を注入する注入工程。
2.シリコーン樹脂を注入したスイッチモジュール102を減圧下に置く減圧工程。
3.シリコーン樹脂を硬化させる硬化工程。
図6は、本発明を適用した第2典型的実施例に係るスイッチング装置の製造方法の説明図であり、特に注入工程を示す。また、図7は、図6に示す製造方法で製造されるスイッチング装置101Aの構成を示す要部断面図である。なお、この第2典型的実施例において上述した第1典型的実施例と同様に構成される部分には同符号を付して説明を省略する。
図8から図10は、本発明の第3典型的実施例に係るスイッチング装置1の製造方法を示す説明図であり、詳細には、図8は注入工程後のスイッチモジュール1Aの要部断面図、図9は減圧工程のスイッチモジュール1Aの要部断面図である。また、図10は検出工程におけるスイッチモジュール1Aの要部断面図である。また、図11は、第3典型的実施例に係る製造方法により製造されるスイッチング装置1の構成を示す要部断面図である。
図12は、本発明を適用した第4典型的実施例に係るスイッチング装置2の構成を示す要部断面図である。第4典型的実施例において、上記第3典型的実施例と同様に構成される各部については、同符号を付して説明を省略する。スイッチング装置2は、上記第3典型的実施例で説明したスイッチング装置1と同様に、半導体素子11を実装した基板15をケース24内に収容し、ケース24に設けられた外部端子14と半導体素子11とをワイヤー19によって接続したものである。スイッチング装置2が備えるケース24は、ベース基材12の周縁部に、ハウジング23を接合して構成される。ハウジング23の断面形状は、ハウジング13と同様に円であってもよいし方形やその他の多角形であってもよい。ハウジング23とベース基材12とは接着剤等によって液体が漏れないように接合されており、ケース24内に液体が充填された場合、この液体を漏れなく貯留できる。
図14は、本発明を適用した第5典型的実施例に係るスイッチング装置3の構成を示す要部断面図である。第5典型的実施例において、上記第3典型的実施例と同様に構成される各部については、同符号を付して説明を省略する。スイッチング装置3は、上記第3典型的実施例で説明したスイッチング装置1と同様に、半導体素子11を実装した基板15をケース26内に収容し、ケース26に設けられた外部端子14と半導体素子11とをワイヤー19によって接続したものである。スイッチング装置3が備えるケース26は、ベース基材12の周縁部にハウジング25を接合して構成される。ハウジング25の断面形状は、ハウジング13と同様に円であってもよいし方形やその他の多角形であってもよい。ハウジング25とベース基材12とは接着剤等によって液体が漏れないように接合されており、ケース26内に液体が充填された場合、この液体を漏れなく貯留できる。
図16は、本発明を適用した第6典型的実施例に係るスイッチング装置4の構成を示す要部断面図である。第6典型的実施例において、上記第3典型的実施例と同様に構成される各部については、同符号を付して説明を省略する。スイッチング装置4は、上記第3典型的実施例で説明したスイッチング装置1と同様に、半導体素子11を実装した基板15をケース28内に収容し、ケース28に設けられた外部端子14と半導体素子11とをワイヤー19によって接続したものである。スイッチング装置4が備えるケース28は、ベース基材12の周縁部にハウジング27を接合して構成される。ハウジング27の断面形状は、ハウジング13と同様に円であってもよいし方形やその他の多角形であってもよい。ハウジング27とベース基材12とは接着剤等によって液体が漏れないように接合されており、ケース28内に液体が充填された場合、この液体を漏れなく貯留できる。
1A スイッチモジュール
10 ケース
11 半導体素子(電子部品)
15 基板
19 ワイヤー(金属ワイヤー)
21、22 ボンディング面
30 シリコーン樹脂(合成樹脂)
31 樹脂被膜
101、101A スイッチング装置(電子装置)
102 スイッチモジュール
110 ケース
111 半導体素子(電子部品)
115 基板
119 ワイヤー(金属ワイヤー)
121、122 ボンディング面
130 シリコーン樹脂(合成樹脂)
131 樹脂被膜
1100 注入装置
1150 真空チャンバー
1152 注入ノズル
Claims (14)
- ケース(10、24、26、28、110)と、
前記ケース(10、24、26、28、110)に収納された電子部品(11、111)と、
前記電子部品(11、111)にワイヤーボンディングにより接合された金属ワイヤー(19、119)と、
前記金属ワイヤー(19、119)が接合されたボンディング面(21、22、121、122)と、前記金属ワイヤー(19、119)と、を被覆する合成樹脂(30、130)と、
を具備する、
電子装置。 - 前記ケース(10、24、26、28、110)内に前記金属ワイヤーの一部が合成樹脂の上面から露出する量の前記合成樹脂(30、130)を注入し、前記ケース(10、24、26、28、110)を減圧下に放置することによって前記合成樹脂(30、130)の液面を上昇させ、前記合成樹脂(30、130)よりも上に露出する前記金属ワイヤー(19、119)に前記合成樹脂(30、130)を付着させることにより、前記金属ワイヤー(19、119)が前記合成樹脂(30、130)で被覆されている、
請求項1に記載の電子装置。 - 更に、
前記ケース(10、24、26、28)に設けられ、注入された前記合成樹脂(30)の液面が前記金属ワイヤー(19)より上に達した場合に、前記合成樹脂(30)が流入する樹脂受け部(41、45、49、53)、
を具備する、
請求項2に記載の電子装置。 - 前記樹脂受け部(41)は、前記ケース内部の空間に露出する凹部(42)からなり、
この凹部(42)の縁は前記金属ワイヤー(19)の上端と同等の高さに位置する、
請求項3に記載の電子装置。 - 前記樹脂受け部(45、53)は、前記ケース(24、28)の側壁(23、27)を切り欠いて形成され、前記ケース(24、28)内部の空間に露出する凹部(46、54)を有し、この凹部(46、54)の縁は前記金属ワイヤーの上端と同等の高さに位置する、
請求項3に記載の電子装置。 - 更に、
前記ケース(26)の側壁(25)に設けられ、注入された前記合成樹脂(30)の液面が前記電子部品に接合された前記金属ワイヤーより上に達した場合に、前記合成樹脂(30)を前記ケース(26)外に流出させる貫通孔(48)、
を具備し、
前記樹脂受け部(49)は、前記ケース(26)の外側面において前記貫通孔(48)の下方に設けられ、前記貫通孔(48)から流出した前記合成樹脂(30)を貯留する凹部(50)を有する、
請求項3に記載の電子装置。 - 更に、
前記ケース(10)の内部の空間に露出する凹部(42)、
を具備し、
前記金属ワイヤー(19)の両端は、前記ボンディング面(21、22)に接合されて、上向きの凸形状とされており、
前記金属ワイヤーの前記凸形状の頂部は、前記ボンディング面(21、22)よりも高い位置に位置し、
前記凹部(42)は、前記凸形状の頂部と同じ高さ、または、前記凸形状の前記頂部よりも高い位置に位置する、
請求項1に記載の電子装置。 - 更に、
前記ケース(24、28)の側壁(23、27)を切り欠いて形成され、前記ケース(24、28)内部の空間に露出する凹部(46、54)、
を具備し、
前記金属ワイヤー(19)の両端は、前記ボンディング面(21、22)に接合されて、上向きの凸形状とされており、
前記金属ワイヤーの前記凸形状の頂部は、前記ボンディング面(21、22)よりも高い位置に位置し、
前記凹部(46、54)は、前記凸形状の頂部と同じ高さ、または、前記凸形状の前記頂部よりも高い位置に位置する、
請求項1に記載の電子装置。 - 更に、
前記ケース(26)の側壁(25)を貫通する貫通孔(48)、
を具備し、
前記金属ワイヤー(19)の両端は、前記ボンディング面(21、22)に接合されて、上向きの凸形状とされており、
前記金属ワイヤーの前記凸形状の頂部は、前記ボンディング面(21、22)よりも高い位置に位置し、
前記貫通孔(48)は、前記凸形状の頂部と同じ高さ、または、前記凸形状の前記頂部よりも高い位置に位置する、
請求項1に記載の電子装置。 - ケース(10、24、26、28、110)に収容された電子部品(11、111)にワイヤーボンディングにより金属ワイヤー(19、119)を接合し、前記金属ワイヤー(19、119)が接合されたボンディング面(21、22、121、122)を合成樹脂(30、130)にて被覆してなる電子装置の製造方法であって、
前記金属ワイヤー(19、119)の少なくとも一部が合成樹脂(30、130)の上面から露出する量の前記合成樹脂(30、130)を、前記ケース(10、24、26、28、110)内に注入し、
前記合成樹脂(30、130)が注入された前記ケース(10、24、26、28、110)を減圧下に置き、減圧により合成樹脂(30、130)の液面を上昇させて、前記合成樹脂(30、130)よりも上に露出していた前記金属ワイヤー(19、119)を前記合成樹脂(30、130)で被覆する、
電子装置の製造方法。 - 前記金属ワイヤー(19、119)の両端を前記ボンディング面(21、22、121、122)に接合し、前記金属ワイヤー(19、119)を上向きの凸形状に形成し、
前記合成樹脂(30、130)を前記ケース(10、24、26、28、110)内に注入する際に、前記金属ワイヤー(19、119)の少なくとも前記凸形状の頂部が注入された前記合成樹脂(30、130)の上面よりも上に露出し、かつ、注入された前記合成樹脂(30、130)により全ての前記ボンディング面(21、22、121、122)が覆われる高さまで、前記合成樹脂(30、130)を注入する、
請求項10に記載の電子装置の製造方法。 - 前記合成樹脂(130)を前記ケース(110)内に注入する際に、前記合成樹脂を前記ケースに注入する注入ノズル(1152)を前記金属ワイヤー(119)上で移動させ、前記合成樹脂(130)の液面よりも上方に位置する前記金属ワイヤー(119)に前記合成樹脂(130)を塗布する、
請求項10または11に記載の電子装置の製造方法。 - 前記ケース(10、24、26、28)に、注入された前記合成樹脂(30)の液面が前記金属ワイヤー(19)より上まで達した場合に前記合成樹脂が流入する樹脂受け部(41、45、49、53)を設け、
前記樹脂受け部(41、45、49、53)に流入した前記合成樹脂(30)を検出する、
請求項10または11に記載の電子装置の製造方法。 - 前記樹脂受け部(41、45、49、53)に、前記合成樹脂(30)を貯留する凹部(42、46、50、54)を設け、
前記凹部(42、46、50、54)に検査光を照射することにより、前記凹部(42、46、50、54)に流入した前記合成樹脂(30)を光学的に検出する、
請求項13に記載の電子装置の製造方法。
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JP2013055150A (ja) * | 2011-09-01 | 2013-03-21 | Toshiba Corp | 半導体装置及びその製造方法 |
JP2015018971A (ja) * | 2013-07-11 | 2015-01-29 | 富士通株式会社 | 放熱板、及び海中機器 |
TW201515291A (zh) * | 2013-10-03 | 2015-04-16 | Lextar Electronics Corp | 發光模組及其應用 |
JP6627358B2 (ja) * | 2015-09-17 | 2020-01-08 | 富士電機株式会社 | 半導体装置および電気装置 |
ITUB20155681A1 (it) | 2015-11-18 | 2017-05-18 | St Microelectronics Srl | Dispositivo elettronico resistente a radiazioni e metodo per proteggere un dispositivo elettronico da radiazioni ionizzanti |
JP6447557B2 (ja) * | 2016-03-24 | 2019-01-09 | 日亜化学工業株式会社 | 発光装置の製造方法 |
KR20210129483A (ko) * | 2020-04-20 | 2021-10-28 | 현대자동차주식회사 | 솔더링 구조, 이를 갖는 파워 모듈 및 파워 모듈의 제조 방법 |
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JP2013021021A (ja) * | 2011-07-07 | 2013-01-31 | Fuji Electric Co Ltd | パワーモジュールの製造方法 |
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Also Published As
Publication number | Publication date |
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US20120146232A1 (en) | 2012-06-14 |
US8497166B2 (en) | 2013-07-30 |
CN102484102A (zh) | 2012-05-30 |
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