WO2017131166A1 - 赤外線センサ - Google Patents
赤外線センサ Download PDFInfo
- Publication number
- WO2017131166A1 WO2017131166A1 PCT/JP2017/002960 JP2017002960W WO2017131166A1 WO 2017131166 A1 WO2017131166 A1 WO 2017131166A1 JP 2017002960 W JP2017002960 W JP 2017002960W WO 2017131166 A1 WO2017131166 A1 WO 2017131166A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- insulating film
- film
- infrared sensor
- pair
- adhesive
- Prior art date
Links
- 239000010408 film Substances 0.000 claims abstract description 142
- 239000000853 adhesive Substances 0.000 claims abstract description 72
- 230000001070 adhesive effect Effects 0.000 claims abstract description 72
- 239000010409 thin film Substances 0.000 claims abstract description 8
- 230000004044 response Effects 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000011889 copper foil Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 230000004043 responsiveness Effects 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910020598 Co Fe Inorganic materials 0.000 description 1
- 229910020637 Co-Cu Inorganic materials 0.000 description 1
- 229910002519 Co-Fe Inorganic materials 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Images
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
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/20—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using resistors, thermistors or semiconductors sensitive to radiation, e.g. photoconductive devices
-
- 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
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
-
- 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
-
- 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
-
- 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
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J2005/103—Absorbing heated plate or film and temperature detector
Definitions
- the present invention relates to an infrared sensor that is suitable for measuring the temperature of a heating roller of a copying machine, a printer or the like and has excellent responsiveness.
- an infrared sensor is disposed opposite the object to be measured and receives the radiant heat to measure the temperature. Is installed.
- an infrared sensor in recent years, a film-type infrared sensor in which a thin film thermistor is formed on an insulating film that is excellent in flexibility and can be thinned as a whole has been developed.
- an insulating film, a first thermal element and a second thermal element provided on one surface of the insulating film, and a first surface of the insulating film are provided on one surface of the insulating film.
- Conductive first wiring film formed and connected to the first thermal element, and conductive second wiring film connected to the second thermal element, and insulative facing the second thermal element An infrared sensor comprising an infrared reflective film provided on the other surface of the film is described. In this infrared sensor, the area of the wiring film on the infrared light receiving side is widened to improve heat collection from the portion of the insulating film that absorbs infrared rays.
- the present invention has been made in view of the above-described problems, and an object of the present invention is to provide an infrared sensor that can efficiently flow heat from an insulating film into a thermal element and has good responsiveness.
- the infrared sensor according to the first invention includes an insulating film, a pair of adhesive electrodes patterned on one surface of the insulating film, and a pair patterned on one surface of the insulating film.
- Terminal electrodes, a thermal element provided on one surface of the insulating film and connected to the pair of adhesive electrodes, one end connected to the pair of adhesive electrodes and the other end to the pair of terminal electrodes Are connected to the adhesive electrode separately from the pattern wiring and heated to one surface of the insulating film than the insulating film.
- a heat transfer film patterned in the vicinity of the adhesive electrode with a thin film having high conductivity.
- a heat transfer film which is connected to the adhesive electrode separately from the pattern wiring and is patterned on the one surface of the insulating film with a thin film having higher thermal conductivity than the insulating film is formed in the vicinity of the adhesive electrode. Since it is provided, heat of the insulating film is hardly taken to the terminal electrode side and can be preferentially transmitted to the heat sensitive element by the heat transfer film. In other words, by controlling the direction of heat generated by the infrared rays received by the insulating film to the adhesive electrode by means of the heat transfer film, much of the received light energy can be efficiently used to increase or decrease the temperature of the thermal element.
- An infrared sensor is characterized in that, in the first invention, the heat transfer film is formed in a larger area than the pattern wiring. That is, in this infrared sensor, since the heat transfer film is formed in a larger area than the pattern wiring, the heat transfer film can receive more heat from the insulating film than the pattern wiring, and more heat can be received. It becomes possible to flow into the thermal element.
- the pattern wiring extends from the adhesive electrode toward the side opposite to the terminal electrode side, and further, the outer periphery of the heat transfer film.
- the terminal electrode is reached after extending along a part of the terminal. That is, in this infrared sensor, the pattern wiring extends from the adhesive electrode toward the side opposite to the terminal electrode side, and further extends along a part of the outer periphery of the heat transfer film before reaching the terminal electrode. Therefore, the extended pattern wiring becomes longer and the thermal resistance becomes larger, and once it extends toward the side opposite to the terminal electrode side, it becomes possible to further suppress the heat flowing to the terminal electrode. .
- connection width of the heat transfer film to the adhesive electrode is set wider than the connection width of the pattern wiring to the adhesive electrode. It is characterized by. That is, in this infrared sensor, since the connection width of the heat transfer film to the adhesive electrode is set wider than the connection width of the pattern wiring to the adhesive electrode, heat can be efficiently transferred from the heat transfer film to the adhesive electrode. In addition, it is difficult for heat to flow from the adhesive electrode to the pattern wiring.
- the pattern wiring has a plurality of meandering portions that are folded back. That is, in this infrared sensor, since the pattern wiring has a plurality of meandering portions that are folded back, it is possible to increase the thermal resistance to the terminal electrode.
- the present invention has the following effects. That is, according to the infrared sensor of the present invention, a pattern is formed in the vicinity of the adhesive electrode with a thin film that is connected to the adhesive electrode separately from the pattern wiring and has a higher thermal conductivity than the insulating film on one surface of the insulating film. Since the heat transfer film is provided, the heat of the insulating film is hardly taken to the terminal electrode side and can be preferentially transmitted to the heat sensitive element by the heat transfer film. Therefore, according to the infrared sensor of the present invention, the heat obtained by receiving infrared rays is actively guided to the thermal element by the heat transfer film, so that the heat resistance can be lowered and more heat can be passed to the thermal element. It has high responsiveness and is suitable for measuring the temperature of a heating roller such as a copying machine or a printer.
- top view (a) and back view (b) show 1st Embodiment of the infrared sensor which concerns on this invention.
- 2nd Embodiment of the infrared sensor which concerns on this invention it is a top view of the state which removed the thermal element.
- 3rd Embodiment of the infrared sensor which concerns on this invention it is a top view of the state which removed the thermal element.
- the infrared sensor 1 of the present embodiment includes an insulating film 2, a pair of first adhesive electrodes 3 ⁇ / b> A patterned on one surface (front surface) of the insulating film 2, and an insulating property.
- a pair of first adhesive electrodes 3A having one end connected to the pair of first adhesive electrodes 3A and the other end connected to the pair of first terminal electrodes 4A and patterned on one surface of the insulating film 2.
- the first wiring electrode 3A is connected to a pair of first adhesive electrodes 3A and has a thin film having a higher thermal conductivity than the insulating film 2 on one surface of the insulating film 2.
- a pattern was formed in the vicinity of the adhesive electrode 3A.
- a heat transfer film 7 pairs The first pattern wiring 6A and the heat transfer film 7 are not in direct contact with each other, but are indirectly connected through the first adhesive electrode 3A.
- the infrared sensor 1 of the present embodiment includes a pair of second adhesive electrodes 3B patterned on one surface of the insulating film 2 and a pair of second adhesive electrodes 3B patterned on one surface of the insulating film 2.
- a pair of second pattern wirings having one end connected to the pair of second adhesive electrodes 3B and the other end connected to the pair of second terminal electrodes 4B and patterned on one surface of the insulating film 2 6B.
- the heat transfer film 7 is formed in a larger area than the first pattern wiring 6A.
- the pair of first pattern wirings 6 ⁇ / b> A extends from the pair of first adhesive electrodes 3 ⁇ / b> A toward the side opposite to the pair of first terminal electrodes 4 ⁇ / b> A, and further on the outer periphery of the pair of heat transfer films 7. After extending along a part, the first terminal electrode 4A is reached correspondingly.
- the first pattern wiring 6A first extends between the pair of heat transfer films 7 from the first adhesive electrode 3A toward the second heat sensitive element 5B, and ends of the pair of heat transfer films 7 In the vicinity, the direction extends along the short side of the insulating film 2 and extends toward the long side, and further, the outer side of the heat transfer film 7 extends along the long side of the insulating film 2 to the first terminal electrode 4A. It is extended.
- the second pattern wiring 6B extends at a shorter distance than the first pattern wiring 6A and reaches the second terminal electrode 4B.
- the connection width of the heat transfer film 7 to the first adhesive electrode 3A is set wider than the connection width of the first pattern wiring 6A to the first adhesive electrode 3A. That is, among the four sides of the first adhesive electrode 3A having a square shape, the heat transfer film 7 is connected to the entire two sides, whereas the first adhesive electrode 3A has four corners.
- the first pattern wiring 6A is connected to one.
- the connection part of the heat transfer film 7 to the first adhesive electrode 3A and the connection part of the first pattern wiring 6A to the first adhesive electrode 3A are set separately.
- the corresponding terminal electrodes of the first thermal element 5A and the second thermal element 5B are bonded to the first adhesive electrode 3A and the second adhesive electrode 3B, respectively, with a conductive adhesive such as solder.
- the other surface (the light-receiving side surface and the back surface) of the insulating film 2 is coated with an infrared reflecting film so as to cover the second heat sensitive element 5B as shown in FIG. 8 is formed.
- the infrared reflection film 8 is formed so as to avoid a position directly above the pair of heat transfer films 7. That is, in the present embodiment, the first heat sensitive element 5A disposed immediately below the infrared light receiving surface is used as an infrared detecting element, and the second heat sensitive element 5B disposed directly below the infrared reflecting film 8 is a compensating element. It is said that.
- each terminal electrode, each pattern wiring, the heat transfer film 7 and the infrared reflection film 8 are hatched.
- the insulating film 2 is formed of a polyimide resin sheet in a substantially rectangular shape, and the infrared reflection film 8, each pattern wiring, each terminal electrode, each adhesive electrode, and the heat transfer film 7 are formed of copper foil. That is, these are double-sided flexible substrates in which an infrared reflecting film 8, each pattern wiring, each terminal electrode, each adhesive electrode, and a heat transfer film 7 are patterned with copper foil on both surfaces of a polyimide substrate to be an insulating film 2. It was produced by.
- the pair of first terminal electrodes 4 ⁇ / b> A and the pair of second terminal electrodes 4 ⁇ / b> B are disposed in the vicinity of the corners of the insulating film 2.
- the infrared reflection film 8 is composed of the copper foil described above and a gold plating film laminated on the copper foil.
- the infrared reflecting film 8 is formed of a material having an infrared reflectance higher than that of the insulating film 2 and is formed by applying a gold plating film on the copper foil as described above.
- a mirror-deposited aluminum vapor deposition film or an aluminum foil may be used.
- the first thermal element 5A and the second thermal element 5B are chip thermistors in which terminal electrodes (not shown) are formed at both ends.
- this thermistor there are thermistors of NTC type, PTC type, CTR type and the like.
- NTC type thermistors are employed as the first thermal element 5A and the second thermal element 5B.
- This thermistor is made of a thermistor material such as a Mn—Co—Cu-based material or a Mn—Co—Fe-based material.
- the thermal conductivity is higher than that of the insulating film 2 on one surface of the insulating film 2 connected to the first adhesive electrode 3A separately from the first pattern wiring 6A. Since the heat transfer film 7 is provided in the vicinity of the first adhesive electrode 3A as a thin film, the heat of the insulating film 2 is not easily deprived to the first terminal electrode 4A side by the heat transfer film 7 preferentially. This can be transmitted to the first thermal element 5A. That is, by controlling the flow direction of heat generated by the infrared rays received by the insulating film 2 to the first adhesive electrode 3A by the heat transfer film 7, most of the received light energy is the temperature of the first thermal element 5A. It is efficiently used for increasing or decreasing temperature.
- the heat transfer film 7 since the heat transfer film 7 is formed with a larger area than the first pattern wiring 6A, the heat transfer film 7 can receive more heat from the insulating film 2 than the first pattern wiring 6A. More heat can be caused to flow into the first thermal element 5A.
- the first pattern wiring 6A extends from the first adhesive electrode 3A toward the side opposite to the first terminal electrode 4A side, and further extends along a part of the outer periphery of the heat transfer film 7. Then, since the first terminal electrode 4A has been reached, the extending first pattern wiring 6A becomes longer and the thermal resistance increases, and once toward the side opposite to the first terminal electrode 4A side. By extending, it becomes possible to further suppress the heat flowing to the first terminal electrode 4A.
- connection width of the heat transfer film 7 to the first adhesive electrode 3A is set wider than the connection width of the first pattern wiring 6A to the first adhesive electrode 3A, the heat transfer film 7 is efficiently used. In addition, heat can be transferred to the first adhesive electrode 3A, and heat hardly flows from the first adhesive electrode 3A to the first pattern wiring 6A.
- FIGS.2 and FIG.3 the same constituent elements described in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.
- FIG.2 and FIG.3 the infrared reflective film 8 formed in the other surface of the insulating film 2 is shown with the broken line.
- the difference between the second embodiment and the first embodiment is that, in the first embodiment, the heat transfer film 7 is connected to the entire two sides of the four sides of the first adhesive electrode 3A having a square shape without any gap.
- the infrared sensor 21 of the second embodiment as shown in FIG. 2, among the four sides of the first adhesive electrode 3A having a square shape, two sides are connected via a constricted portion 27a. The heat transfer film 27 is partially connected.
- the constricted portion 27a in which the connection portion is narrowed has been.
- the constricted portion 27a since the constricted portion 27a is formed in the connection portion of the heat transfer film 27 to the first terminal electrode 4A, the constricted portion 27a functions as a thermal land, and heat is required during soldering. As described above, it is possible to suppress the escape to the surroundings and it is difficult for the solder to be melted to cause a solder failure. Even in this case, the thin first pattern wiring 6A is connected to only one side of the first adhesive electrode 3A, and heat hardly flows from the first adhesive electrode 3A to the first pattern wiring 6A. Yes.
- the end of the heat transfer film 27 on the first terminal electrode 4A side is formed larger than in the first embodiment. That is, since the end portion of the heat transfer film 27 is formed to extend between the pair of first terminal electrodes 4A, the heat collection range by the heat transfer film 27 can be expanded.
- the difference between the third embodiment and the second embodiment is that in the second embodiment, the first pattern wiring 6A extends from the first adhesive electrode 3A toward the second thermal element 5B. Further, while reaching the first terminal electrode 4A via the outside of the heat transfer film 27, the infrared sensor 31 of the third embodiment has a pair of first pattern wirings as shown in FIG. 36A extends in a direction opposite to that of the first embodiment from the pair of first adhesive electrodes 3A, and reaches the corresponding first terminal electrode 4A through a plurality of meandering portions 36a that are bent back and forth. is there.
- the first pattern wiring 36A since the first pattern wiring 36A has the meandering portion 36a, the thermal resistance to the first terminal electrode 4A can be increased. Therefore, as in the second embodiment, the first pattern wiring 6A is once extended toward the second heat sensitive element 5B side and extended long without being detoured outside the heat transfer film 37. The heat flowing to the first terminal electrode 4A can be suppressed.
- the first heat sensitive element detects heat conducted from the insulating film that directly absorbs infrared rays, but is directly above the first heat sensitive element and is one of the insulating films.
- An infrared absorption film having higher infrared absorption than the insulating film may be formed on the surface. In this case, the infrared absorption effect in the first thermal element is further improved, and a better temperature difference between the first thermal element and the second thermal element can be obtained.
- the infrared absorption film absorbs infrared rays due to radiation from the object to be measured, and the temperature of the first thermosensitive element immediately below is obtained by heat conduction through the insulating film from the infrared absorption film that absorbs infrared rays and generates heat. May be changed.
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Abstract
Description
このような赤外線センサとしては、近年、柔軟性に優れると共に全体を薄くすることができる絶縁性フィルム上に薄膜サーミスタを形成したフィルム型赤外線センサが開発されている。
センサの感度向上や応答速度改善を行うためには、赤外線を受光した絶縁性フィルムから熱を感熱素子に効率的に流入させ感熱素子の温度変化を早める必要がある。しかしながら、上記特許文献1に記載の技術では、赤外線受光側に形成した広い配線膜により熱収集を改善しているものの、配線膜から端子電極にも熱が流入してしまうことから、さらに効率的に感熱素子に熱を移動させる構造が要望されていた。
すなわち、この赤外線センサでは、伝熱膜が、パターン配線よりも広い面積で形成されているので、絶縁性フィルムから熱を伝熱膜がパターン配線よりも多く受けることができ、より多くの熱を感熱素子に流入させることが可能になる。
すなわち、この赤外線センサでは、パターン配線が、接着電極から端子電極側とは反対側に向けて延在し、さらに伝熱膜の外周の一部に沿って延在してから端子電極に達しているので、延在するパターン配線が長くなって熱抵抗が大きくなると共に、一旦は端子電極側と反対側に向けて延在することで、より端子電極に流れる熱を抑制することが可能になる。
すなわち、この赤外線センサでは、伝熱膜の接着電極に対する接続幅が、パターン配線の接着電極に対する接続幅よりも広く設定されているので、伝熱膜から効率的に接着電極に熱を伝えることができると共に、接着電極からはパターン配線に熱が流れ難くなる。
すなわち、この赤外線センサでは、パターン配線が、複数折り返して蛇行した部分を有しているので、端子電極までの熱抵抗を大きくすることが可能になる。
すなわち、本発明に係る赤外線センサによれば、パターン配線とは別に接着電極に接続され絶縁性フィルムの一方の面に絶縁性フィルムよりも熱伝導率が高い薄膜で接着電極の近傍にパターン形成された伝熱膜を備えているので、絶縁性フィルムの熱を端子電極側に奪われ難く伝熱膜によって優先的に感熱素子に伝えることができる。
したがって、本発明の赤外線センサによれば、赤外線を受光して得た熱を伝熱膜によって積極的に感熱素子へ導くことで、熱抵抗を下げて熱をより多く感熱素子に流すことができ、高い応答性を有して複写機やプリンタ等の加熱ローラの温度測定用として好適である。
上記第1のパターン配線6Aと伝熱膜7とは、互いに直接的には接触しておらず、第1の接着電極3Aを介して間接的に接続している。
一対の上記第1のパターン配線6Aは、一対の第1の接着電極3Aから一対の第1の端子電極4A側とは反対側に向けて延在し、さらに一対の伝熱膜7の外周の一部に沿って延在してからそれぞれ対応する第1の端子電極4Aに達している。すなわち、第1のパターン配線6Aは、まず第1の接着電極3Aから第2の感熱素子5Bに向けて一対の伝熱膜7の間を延在し、そして一対の伝熱膜7の端部近傍で絶縁性フィルム2の短辺に沿った方向であって長辺に向けて延在し、さらに伝熱膜7の外側を絶縁性フィルム2の長辺に沿って第1の端子電極4Aまで延在している。
伝熱膜7の第1の接着電極3Aに対する接続幅は、第1のパターン配線6Aの第1の接着電極3Aに対する接続幅よりも広く設定されている。すなわち、正方形状とされた第1の接着電極3Aの4辺のうち、2辺全体に伝熱膜7が接続されているのに対し、第1の接着電極3Aに4つある角部のうち1つに第1のパターン配線6Aが接続されている。このように伝熱膜7の第1の接着電極3Aへの接続部と、第1のパターン配線6Aの第1の接着電極3Aへの接続部とは、別々に設定されている。
上記第1の接着電極3A及び第2の接着電極3Bには、それぞれ対応する第1の感熱素子5A及び第2の感熱素子5Bの端子電極が半田等の導電性接着剤で接着されている。
すなわち、本実施形態では、赤外線の受光面直下に配された第1の感熱素子5Aが赤外線の検出用素子とされ、赤外線反射膜8直下に配された第2の感熱素子5Bが補償用素子とされている。
なお、図1の(a)(b)において、各端子電極、各パターン配線、伝熱膜7及び赤外線反射膜8をハッチングで図示している。
上記一対の第1の端子電極4A及び一対の第2の端子電極4Bは、絶縁性フィルム2の角部近傍に配設されている。
この赤外線反射膜8は、絶縁性フィルム2よりも高い赤外線反射率を有する材料で形成され、上述したように、銅箔上に金メッキ膜が施されて形成されている。なお、金メッキ膜の他に、例えば鏡面のアルミニウム蒸着膜やアルミニウム箔等で形成しても構わない。
また、第1のパターン配線6Aが、第1の接着電極3Aから第1の端子電極4A側とは反対側に向けて延在し、さらに伝熱膜7の外周の一部に沿って延在してから第1の端子電極4Aに達しているので、延在する第1のパターン配線6Aが長くなって熱抵抗が大きくなると共に、一旦は第1の端子電極4A側と反対側に向けて延在することで、より第1の端子電極4Aに流れる熱を抑制することが可能になる。
このように第2実施形態では、第1の端子電極4Aへの伝熱膜27の接続部分にくびれ部27aを形成しているので、くびれ部27aがサーマルランドとして機能し、ハンダ時に熱が必要以上に周囲に逃げてハンダが溶け難くなってハンダ不良となることを抑制することができる。なお、この場合でも、細い第1のパターン配線6Aが第1の接着電極3Aの1辺だけに接続されており、第1の接着電極3Aから熱が第1のパターン配線6Aへ流れ難くなっている。
Claims (5)
- 絶縁性フィルムと、
前記絶縁性フィルムの一方の面にパターン形成された一対の接着電極と、
前記絶縁性フィルムの一方の面にパターン形成された一対の端子電極と、
前記絶縁性フィルムの一方の面に設けられ一対の前記接着電極に接続された感熱素子と、
一対の前記接着電極に一端が接続されていると共に一対の前記端子電極に他端が接続され前記絶縁性フィルムの一方の面にパターン形成された一対のパターン配線と、
前記パターン配線とは別に前記接着電極に接続され前記絶縁性フィルムの一方の面に前記絶縁性フィルムよりも熱伝導率が高い薄膜で前記接着電極の近傍にパターン形成された伝熱膜とを備えていることを特徴とする赤外線センサ。 - 請求項1に記載の赤外線センサにおいて、
前記伝熱膜が、前記パターン配線よりも広い面積で形成されていることを特徴とする赤外線センサ。 - 請求項1に記載の赤外線センサにおいて、
前記パターン配線が、前記接着電極から前記端子電極側とは反対側に向けて延在し、さらに前記伝熱膜の外周の一部に沿って延在してから前記端子電極に達していることを特徴とする赤外線センサ。 - 請求項1に記載の赤外線センサにおいて、
前記伝熱膜の前記接着電極に対する接続幅が、前記パターン配線の前記接着電極に対する接続幅よりも広く設定されていることを特徴とする赤外線センサ。 - 請求項1に記載の赤外線センサにおいて、
前記パターン配線が、複数折り返して蛇行した部分を有していることを特徴とする赤外線センサ。
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CN201780004034.XA CN108351249A (zh) | 2016-01-29 | 2017-01-27 | 红外线传感器 |
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