WO2006057191A1 - 赤外線検出装置 - Google Patents
赤外線検出装置 Download PDFInfo
- Publication number
- WO2006057191A1 WO2006057191A1 PCT/JP2005/021098 JP2005021098W WO2006057191A1 WO 2006057191 A1 WO2006057191 A1 WO 2006057191A1 JP 2005021098 W JP2005021098 W JP 2005021098W WO 2006057191 A1 WO2006057191 A1 WO 2006057191A1
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- WO
- WIPO (PCT)
- Prior art keywords
- infrared
- light receiving
- chip
- infrared detection
- receiving window
- Prior art date
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/04—Casings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/04—Casings
- G01J5/041—Mountings in enclosures or in a particular environment
- G01J5/044—Environment with strong vibrations or shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/04—Casings
- G01J5/041—Mountings in enclosures or in a particular environment
- G01J5/045—Sealings; Vacuum enclosures; Encapsulated packages; Wafer bonding structures; Getter arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/04—Casings
- G01J5/048—Protective parts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/93—Batch processes
- H01L24/95—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
- H01L24/97—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0203—Containers; Encapsulations, e.g. encapsulation of photodiodes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0875—Windows; Arrangements for fastening thereof
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- 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
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/0554—External layer
- H01L2224/0555—Shape
- H01L2224/05552—Shape in top view
- H01L2224/05553—Shape in top view being rectangular
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- H01—ELECTRIC ELEMENTS
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- 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
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/45144—Gold (Au) as principal constituent
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- H—ELECTRICITY
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- 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
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- 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
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48225—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/48227—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item
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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
Definitions
- the present invention relates to an infrared detection device, and more particularly to a thermal infrared detection device such as a porometer, a thermometer, a pyroelectric sensor, a diode method, and a bimetal method.
- a thermal infrared detection device such as a porometer, a thermometer, a pyroelectric sensor, a diode method, and a bimetal method.
- thermopile pyroelectric sensor
- diode type diode type
- bimetal type one described in Patent Document 1
- an infrared light receiving window is disposed with a gap on the front surface of a light receiving portion formed on a silicon substrate, and the light receiving window is an adhesive surface in a range surrounding the light receiving portion.
- This is a structure in which the inside of the gap is evacuated by being hermetically bonded to each other.
- Patent Document 1 Japanese Patent Laid-Open No. 09-243449
- An object of the present invention is to provide an infrared detection device that can be easily and reliably mounted in various applications that are resistant to mechanical shocks. .
- An infrared detection device includes an infrared detection chip in which an infrared light receiving portion and a signal input / output terminal connected thereto are formed on a silicon substrate, and is fixed to the light receiving side of the infrared detection chip.
- a light receiving window chip that exposes the signal input / output terminals and forms a sealed space for accommodating the light receiving unit, and transmits at least infrared light to be detected; and an infrared detector.
- a base member having a mounting surface for mounting an output chip, and an internal lead terminal provided in the vicinity of the mounting surface; a bonding wire for electrically connecting the signal input / output terminal and the internal lead terminal;
- a coating member in which at least a signal input / output terminal, an internal lead terminal, and a bonding wire are taken into the interior, and a resin is injected and cured so as to cover at least the infrared detection chip side of the side surface of the light receiving window chip; It is characterized by providing.
- the infrared detection device since the portion that is susceptible to mechanical impact such as a bonding wire is taken into the inside of the covering member, the infrared detection device has high impact resistance and can be mounted on various devices. Can be implemented easily and reliably.
- the coating member covers the side surface of the silicon substrate, the thermal capacity of the silicon substrate is increased and the influence of external forces that can include the side force of the silicon substrate is shut off.
- the sensitivity as a sensor can be increased in the outside line detection device. If the infrared detector according to the present invention is picked up with a pyramid collet, the suction part of the collet comes into contact with the covering member of the infrared detector, so that the suction part directly forms the light receiving window chip. Since the upper surface is not touched, damage due to contact with the suction portion can be prevented, which can contribute to an improvement in process yield.
- a spacer may be interposed between the infrared detection chip and the light receiving window chip so as to surround the sealed space.
- the sealed space between the infrared detection chip and the light receiving window chip is increased by the thickness of the spacer, and the thermal insulation of the infrared light receiving section is enhanced, thereby improving the sensitivity of the infrared detection device.
- the spacer plays a role in blocking the flow of the resin in the step of injecting the resin to be a covering member. When the resin hardens while shrinking, the infrared detection chip and the light receiving window chip are attracted to each other. Adhesion increases.
- the infrared detection device it is preferable that a recess is formed on the surface of the light receiving window chip on the sealed space side.
- the capacity of the sealed space can be secured larger, and the heat insulating property of the infrared light receiving part is further increased, so that the sensitivity of the infrared ray detecting device can be further improved.
- a sealed space can be secured, so that a decrease in sensitivity can be suppressed.
- the base member has a substrate portion having a mounting surface on the upper surface and a top surface standing on the substrate portion so as to exceed the upper surface of the light receiving window chip. It is preferable that it is comprised including the wall plate part which was made. In this way, the wall plate portion that extends beyond the upper surface of the light receiving window chip is provided, so that, for example, when the infrared detecting device according to the present invention is picked up by a flat collet, the tip surface of the suction portion is the infrared detecting device It comes into contact with the top surface of the wall plate portion of the light receiving window, and does not directly contact the top surface of the light receiving window chip. For this reason, it is possible to prevent damage due to contact with the suction portion, and to contribute to the improvement of the process yield.
- the internal lead terminal is electrically connected to an external lead terminal provided on the lower surface of the base member.
- the external lead terminal is provided on the lower surface of the base member, mounting on a circuit board or the like can be performed easily and reliably.
- FIG. 1 is a cross-sectional view showing a configuration of an infrared detection device according to a first embodiment.
- FIG. 2 is an explanatory view of the infrared detecting device according to the first embodiment as viewed from the side incident with infrared rays.
- FIG. 3 is an explanatory view showing a method of manufacturing the infrared detection device according to the first embodiment.
- FIG. 4 is an explanatory view showing a positional relationship between the infrared detecting device and the mounting collet according to the first embodiment.
- FIG. 5 is a cross-sectional view showing a configuration of an infrared detection device according to a second embodiment.
- FIG. 6 is a cross-sectional view showing a configuration of an infrared detection device according to a third embodiment.
- FIG. 7 is an explanatory view showing a method of manufacturing the infrared detection device according to the third embodiment.
- FIG. 8 is an explanatory diagram showing a positional relationship between an infrared detecting device and a mounting collet according to a third embodiment.
- thermopile type infrared detection device which is a preferred embodiment of the present invention will be described in detail.
- the same or equivalent components are denoted by the same reference numerals, and redundant description is omitted.
- FIG. 1 is a cross-sectional view showing the configuration of the infrared detection device according to the first embodiment
- FIG. 2 is an explanatory view of the side force incident on the infrared ray.
- the infrared detection device 1 includes a base member 10 that forms an envelope that accommodates the main functional parts of the device, and a substrate portion 11 that constitutes the base member 10.
- An infrared detection chip 20 for detecting infrared rays mounted on the mounting surface 13 of the optical sensor, a light receiving window chip 30 provided on the infrared detection chip 20 for transmitting infrared rays, and an infrared detection chip Bonding wires 38 for connecting the 20 terminals and the base member 10 are provided.
- What is characteristic of the present embodiment is that the surface from the upper surface of the light receiving window chip 30 is covered with a coating member 40 in which the resin is cured, and the bonding wire 38 is taken inside. It is to be included.
- the base member 10 has a concave space having an upper opening, and is a rectangular and flat substrate having a mounting surface 13 for mounting the infrared detection chip 20 on the lower portion of the base member 10.
- a portion 11 and a wall plate portion 14 erected on two vertical sides and two horizontal sides so as to surround the mounting surface 13 are configured.
- a land type internal lead terminal 12 connected to a conductive part 15 passing through the board part 11 is provided, and this conductive part 15 is provided on the bottom surface of the base member 10. It is electrically connected to an external lead terminal 42 provided on the side opposite to the mounting surface 13.
- the glass member 10 is made of glass epoxy (epoxy resin with a glass fiber sheet as the core) such as FR-4, FR-5, 0-10, etc., which resists heat dissipation when curing the resin.
- glass epoxy epoxy resin with a glass fiber sheet as the core
- other organic substrates and ceramic substrates may be used.
- the infrared detection chip 20 is mounted on a mounting surface 13 set on the upper surface of the substrate portion 11 of the base member 10.
- a thin diaphragm portion 22 is formed at the center of the upper surface of the silicon substrate 21.
- a signal input / output terminal (electrode pad) 25 that is electrically connected by an aluminum wiring or the like is provided on the peripheral edge of the upper surface of the silicon substrate 21 in order to take out the electrical output signal obtained by the infrared light receiving unit 23.
- RU signal input / output terminal
- a method of forming the diaphragm portion 22 and the cavity portion 24 will be described.
- a sacrificial layer (not shown) having the same isostatic force as that of the cavity 24 is formed on the upper surface of the silicon substrate 21, and a thin film to be the diaphragm 22 is formed thereon.
- This thin film is provided with an etching hole (not shown) used when the sacrificial layer is etched.
- an etching solution such as potassium hydroxide solution is infiltrated through this etching hole to etch the sacrificial layer isotropically, and then the silicon substrate 21 is removed by anisotropic etching.
- a cavity 24 of an inverted trapezoidal pyramid for heat separation is formed in this removal portion.
- the thin film portion covering the upper surface of the cavity portion 24 becomes the diaphragm portion 22.
- the cavity 24 is used to thermally insulate the infrared light receiving unit 23 from below, and is filled with a vacuum state or an inert gas
- the silicon substrate 21 is preferably formed of a (100) plane single crystal silicon substrate. In this way, since the upper surface of the silicon substrate 21 is the (100) plane and the vertical direction, which is the infrared incident direction, is easily etched, the cavity 24 can be easily formed. If the desired diaphragm 22 can be formed, the method and shape for forming the cavity 24 is not limited to this, and isotropic etching, that is, a surface other than the (100) plane wafer. You can use azimuth Ueno or SOI wafer!
- the infrared light receiving unit 23 is provided with a number of thermocouple hot junctions (not shown) connected in series.
- a thermocouple connects two types of metal in series to create two junction points.
- This temperature sensor uses the principle of the “Seebeck effect” in which a thermoelectromotive force is generated when a temperature difference occurs between the two junction points (hot junction and cold junction).
- polysilicon and aluminum form a hot junction (temperature junction) and a cold junction (reference junction), respectively, and the hot junction is disposed on the diaphragm 22.
- the cold junction is disposed on the silicon substrate 21 and the thermoelectromotive force therebetween is measured.
- the light receiving window chip 30 has a rectangular flat plate shape smaller than the infrared detection chip 20, and is positioned on the light receiving side (upper side) of the infrared ray detection chip 20 to expose the signal input / output terminal 25.
- the signal input / output terminal 25 is electrically connected to the sealed space 34 side with an electric wiring such as aluminum.
- the upper and lower surfaces of the electrical wiring located in the spacer 36 are electrically insulated.
- the upper surface 30 a of the light receiving window chip 30 fixed on the infrared detection chip 20 via the spacer 36 is lower than the top surface 14 a of the wall plate portion 14.
- the infrared detection chip 20 and the light receiving window chip 30 face each other through the spacer 36, thereby forming a sealed space 34 that accommodates the infrared light receiving unit 23.
- the sealed space 34 functions as a heat insulating layer, and the cavity is connected through the etching hole formed in the cavity portion 24 and the diaphragm portion 22 of the infrared detection chip 20, and surrounds the infrared light reception portion 23 to form a heat separation structure.
- the sensitivity of the thermocouple inside the infrared light receiving part 23 is improved, and the thermal separation degree of the infrared light receiving part 23 is increased.
- the sealed space 34 has substantially the same pressure as the cavity portion 24 of the infrared detection chip 20 and is filled with a vacuum state or an inert gas because the infrared light receiving portion 23 is also thermally insulated from the surrounding force.
- Spacer 36 is a process of injecting the resin to become the covering member 40, and serves to prevent the resin from flowing into the sealed space 34.
- the injected resin is contracted and hardened to improve adhesion. Increases the effect.
- Spacer 36 is made of resin such as epoxy, acrylic, urethane, polyimide, glass materials such as Pyrex (registered trademark) and low-melting glass, ceramics such as alumina and aluminum nitride, aluminum, gold, nickel, tungsten It may be a metal or alloy such as silicide, or a solder material such as gold tin.
- the spacer 36 when a solder material is used as the spacer 36, adhesion is good if a metal film is formed on both surfaces of the silicon substrate 21 and the light receiving window chip 30 in advance. Also, it may be a stack of spacer materials to increase the height of the spacer 36.
- the light receiving window chip 30 exhibits a function of transmitting light in a band including infrared rays to be detected, so that it is formed of an excellent silicon material having a transmission wavelength range of 1.5 to 20 m. Are preferred.
- the infrared reflection preventing film 32 on both surfaces 30a and 30b of the light receiving window chip 30 to reduce the infrared reflection loss, and to increase the sensitivity of the infrared detection device 1 to the infrared rays. It can.
- the antireflection film 32 can be easily formed by a known vapor deposition method, sputtering method, thermal oxidation method, or the like.
- an infrared filter film that selectively transmits infrared light having a specific wavelength may be provided.
- the bonding wire 38 includes the signal input / output terminal 25 exposed on the upper surface of the infrared detection chip 20 (the outer surface of the portion covered with the light receiving window chip 30), and the base member 10 It is spanned between the internal lead terminals 12 provided on the upper surface of the substrate portion 11 and electrically connected thereto. Inside the space formed by the base member 10 as an envelope, is below a predetermined distance from the upper surface 30a of the light receiving window chip 30 (in this embodiment, 0.2 mm below the upper surface 30a of the light receiving window chip 30). Filled with hardened resin to the side.
- the bonding wire 38 which is a gold thin wire
- the signal input / output terminal 25 and the internal lead terminal 12 to which the bonding wire 38 is connected are taken into the covering member.
- the covering member 40 that not only improves the impact resistance and vibration resistance, but substantially increases the heat capacity of the infrared ray detection chip 20 and blocks the influence of heat from the outside. Also has the effect.
- the resin used for the covering member 40 may be transparent or colored depending on whether a resin such as silicone, epoxy, acrylic, urethane, or a composite material filler is included.
- Fig. 2 shows the case where transparent grease is used.
- each infrared detecting device 1 is obtained by cutting into a square shape with a dicing saw or the like.
- a base member array plate 100 is prepared in which internal lead terminals 12, external lead terminals 42, and conductive portions 15 for connecting them are formed in advance.
- walls 102 are provided so as to cross each other at regular intervals in the vertical and horizontal directions, and a plurality of spaces partitioned by this (infrared detection chips 20 and light receiving window chips 30 are accommodated therein). And hereinafter referred to as a housing space).
- the walls 102 surrounding the recesses arranged on the base member array plate 100 become the wall plate portions 14 when cut by the individual infrared detection devices 1.
- a pre-fabricated bonded body 44 of the infrared detection chip 20, the spacer 36, and the light receiving window chip 30 is placed at a predetermined position on the mounting surface 13 and fixed with an adhesive or the like in the partitioned accommodation space. .
- the signal input / output terminal 25 of the infrared detection chip 20 fixed in each accommodation space and the internal lead terminal 12 of the base member 10 are connected by a bonding wire 38.
- silicone resin is injected into each housing space (see FIG. 3B). At this time, the silicone resin is injected to a position lower than the upper surface 30a (in this embodiment, 0.2 mm below the upper surface 30a of the light receiving window chip 30) so as not to flow to the upper surface 30a of the light receiving window chip 30.
- the wall plates 14 are cut vertically and horizontally along the center line in the arrangement direction. As a result, a chip-shaped infrared detector 1 as shown in FIGS. 1 and 2 is obtained. For easy cutting, a forceful cut or slit may be made along the center line of the wall plate 14.
- the infrared detection device 1 according to this embodiment manufactured by the above manufacturing method has the following operations and effects.
- the infrared detection device 1 has high impact resistance, and can be easily and reliably mounted on various devices.
- the internal lead terminal 12 is electrically connected to the external lead terminal 42 via the conductive portion 15, it can be easily mounted on each circuit board.
- the operation of the infrared detection device 1 will be described.
- Receiver window chip When the infrared rays to be detected are irradiated, the side force on the upper surface 30a of the surface 30 is also absorbed by the infrared light receiving unit 23 through the sealed space 34.
- the temperature of the infrared receiver 23 rises according to the amount of incident infrared rays, and the temperature of the diaphragm 22 also rises with this temperature rise. Therefore, a temperature difference is generated between the diaphragm portion 22 and the silicon substrate 21, and this temperature difference appears at the hot junction of the thermocouple inside the infrared light receiving portion 23 and the cold junction of the thermocouple on the silicon substrate 21.
- the infrared detection device 1 Since the infrared detection device 1 according to the present embodiment and the silicon substrate 21 on which the cold junction is formed are covered with the covering member 40, the heat from the silicon substrate 21 is difficult to escape. Thus, temperature fluctuations in the silicon substrate 21 can be stabilized.
- the sealed space 34 between the infrared detection chip 20 and the light receiving window chip 30 has a large volume by the thickness of the spacer 36, that is, heat radiation from the infrared light receiving portion 23 to the light receiving window chip 30 is blocked. As a result, the thermal insulation of the infrared light receiving part 23 is enhanced. For this reason, the heat exchange rate for converting infrared rays into heat can be increased, and the sensitivity of the infrared detector 1 as a sensor can be increased.
- the infrared detecting device 1 has a structure in which the top surface 14a of the wall plate portion 14 exceeds the upper surface 30a of the light receiving window chip 30, so When picking up the detection device 1 and mounting it on another device, the front end surface 110a of the flat collet 110 comes into contact with the top surface 14a of the wall plate 14 and directly comes into contact with the upper surface of the light receiving window chip. There is no. Therefore, damage due to contact with the flat collet 110 can be prevented, and the process yield can be improved.
- FIG. 5 is a cross-sectional view showing the configuration of the infrared detection apparatus according to the second embodiment.
- the difference between the infrared detecting device 60 according to this embodiment and the first embodiment is that the surface of the light receiving window chip 62 on the side of the sealed space 61 is exposed upward by etching or the like in a region facing the infrared light receiving unit 23. That is, the concave portion 63 is formed.
- the manufacturing method of the infrared detecting device 60 according to the second embodiment is the same as the manufacturing method of the first embodiment, and thus description thereof is omitted.
- the infrared detection device 60 has high impact resistance, and can be easily and reliably mounted on various devices.
- the silicon substrate 21 can have a large heat capacity, and temperature fluctuations in the silicon substrate 21 can be stabilized.
- this embodiment can secure a larger capacity of the sealed space 61 due to the above-described characteristic configuration.
- the infrared light receiving unit 23 is further easily insulated, and the sensitivity can be further improved.
- the light receiving window chip 62 with the recess 63 and the infrared detection chip 20 are directly coupled to form the spacer 36! / In some cases, the spacer 36 cannot be raised! / The space 61 can be secured, and the decrease in sensitivity of the infrared detection device 60 can be suppressed.
- one recess 63 is formed.
- the present invention is not limited to this, and a plurality of recesses 63 may be formed.
- the recess 63 is formed in a region facing the infrared light receiving unit 23, but may be formed in a region other than the region facing the infrared light receiving unit 23.
- FIG. 6 is a cross-sectional view showing the configuration of the infrared detection apparatus according to the third embodiment.
- the structure of the infrared detection device 50 according to the third embodiment is basically the same as the structure of the infrared detection device 1 according to the first embodiment described above. The structure is different.
- the base member 52 does not have a wall plate portion. Instead of the internal lead terminal 12, the external lead terminal 42, and the conductive portion 15 connecting the same in the first embodiment described above, the base member 52 penetrates the substrate portion 56. Thus, an internal lead terminal 54 that directly conducts both the upper and lower surfaces of the substrate portion 56 is provided.
- the internal lead terminal 54 has a surface mounting type “U” shape and an inverted “U” shape, and is fitted to both ends of the board portion 56 so as to face each other.
- the covering member 58 is filled to a lower side from the upper surface 30a of the light receiving window chip 30 by a predetermined distance (0.2 mm below the upper surface 30a of the light receiving window chip 30 in this embodiment).
- the covering member 58 is The base member 52 protrudes outside the internal lead terminal 54 in the direction perpendicular to the shooting direction.
- the film 64 is fixed to the bottom of the protruding part.
- FIG. 7 (a) a base member base material 130 on which internal lead terminals 54 penetrating the substrate portion 56 are prepared in advance, and an outer frame is formed around the base member base material 130. (Not shown) is installed to form an accommodation space.
- a pre-manufactured joint 44 of the infrared detection chip 20, the spacer 36, and the light receiving window chip 30 is placed at a predetermined position on the mounting surface 13 and fixed by adhesion or the like.
- the signal input / output terminal 25 of each joined body 44 and the internal lead terminal 54 of the base member 52 are connected by the bonding wire 38.
- the film 64 is bonded so that the opening 65 formed by the adjacent internal lead terminals 54 of the base member 52 covers the mounting surface 13 side force.
- silicone resin is injected into the accommodation space (see FIG. 7 (b)). At this time, the silicone resin is injected to a position lower than the upper surface 30a (in this embodiment, 0.2 mm below the upper surface 30a of the light receiving window chip 30) so as not to flow to the upper surface 30a of the light receiving window chip 30. .
- the resin since the opening 65 is blocked by the film 64, the resin does not flow into the opening 65.
- the injected silicone resin is allowed to stand, and is cured by a method such as heating or ultraviolet irradiation, and then cut vertically and horizontally along the center of the opening 65 as shown in FIG. 7 (c). As a result, a chip-shaped infrared detecting device 50 as shown in FIG. 6 is obtained.
- the infrared detection device 50 has high impact resistance, and can be easily and reliably mounted on various devices, and can increase the sensitivity as a sensor. Further, since the present embodiment has the above-described characteristic configuration, as shown in FIG. 8, when the infrared detecting device 50 according to the present invention is picked up by a pyramid type collet and mounted on another device, the pyramid is formed. When the collet 120 is in contact with the covering member 58 of the infrared detector 50, the pyramid collet 120 does not directly touch the upper surface 30a of the light receiving window tip 30, so that damage due to contact with the pyramid collet 120 can be prevented. Occurrence can be prevented and the process yield can be improved. Note that the present invention is not limited to the above embodiment. For example, in this embodiment, a force pin type in which the internal lead terminal is a land type may be used.
- the infrared detection device has been described as a thermopile.
- a porometer a pyroelectric sensor, a diode method, a bimetal method, or the like may be used. Similar results are obtained.
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- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
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- Radiation Pyrometers (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05806757.0A EP1816454A4 (en) | 2004-11-24 | 2005-11-17 | INFRARED SENSOR |
US11/791,318 US20080164413A1 (en) | 2004-11-24 | 2005-11-17 | Infrared Sensor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004339626A JP2006145501A (ja) | 2004-11-24 | 2004-11-24 | 赤外線検出装置 |
JP2004-339626 | 2004-11-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006057191A1 true WO2006057191A1 (ja) | 2006-06-01 |
Family
ID=36497929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/021098 WO2006057191A1 (ja) | 2004-11-24 | 2005-11-17 | 赤外線検出装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080164413A1 (ja) |
EP (1) | EP1816454A4 (ja) |
JP (1) | JP2006145501A (ja) |
KR (1) | KR20070084261A (ja) |
CN (1) | CN101065648A (ja) |
TW (1) | TW200617360A (ja) |
WO (1) | WO2006057191A1 (ja) |
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US20110024628A1 (en) * | 2007-12-17 | 2011-02-03 | Jeffrey Wright | Apparatus having a screened structure for detecting thermal radiation |
JP2015084306A (ja) * | 2013-10-25 | 2015-04-30 | 三菱電機株式会社 | 加熱調理器 |
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US20110024628A1 (en) * | 2007-12-17 | 2011-02-03 | Jeffrey Wright | Apparatus having a screened structure for detecting thermal radiation |
US8575550B2 (en) * | 2007-12-17 | 2013-11-05 | Pyreos Ltd. | Apparatus having a screened structure for detecting thermal radiation |
JP2015084306A (ja) * | 2013-10-25 | 2015-04-30 | 三菱電機株式会社 | 加熱調理器 |
CN112326554A (zh) * | 2019-08-05 | 2021-02-05 | 上海科技大学 | 一种控制中高温度和压力的原位红外微型反应池 |
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CN114628532A (zh) * | 2022-04-06 | 2022-06-14 | 江苏鼎茂半导体有限公司 | 一种红外影像感测器的新型封装结构 |
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Also Published As
Publication number | Publication date |
---|---|
EP1816454A4 (en) | 2014-01-01 |
TW200617360A (en) | 2006-06-01 |
CN101065648A (zh) | 2007-10-31 |
KR20070084261A (ko) | 2007-08-24 |
US20080164413A1 (en) | 2008-07-10 |
JP2006145501A (ja) | 2006-06-08 |
EP1816454A1 (en) | 2007-08-08 |
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