WO2012014743A1 - 車載用電子機器に用いる基板構造 - Google Patents
車載用電子機器に用いる基板構造 Download PDFInfo
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- WO2012014743A1 WO2012014743A1 PCT/JP2011/066432 JP2011066432W WO2012014743A1 WO 2012014743 A1 WO2012014743 A1 WO 2012014743A1 JP 2011066432 W JP2011066432 W JP 2011066432W WO 2012014743 A1 WO2012014743 A1 WO 2012014743A1
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- Prior art keywords
- ceramic substrate
- circuit
- green sheet
- wiring pattern
- layer
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
- H05K3/4626—Manufacturing multilayer circuits by laminating two or more circuit boards characterised by the insulating layers or materials
- H05K3/4629—Manufacturing multilayer circuits by laminating two or more circuit boards characterised by the insulating layers or materials laminating inorganic sheets comprising printed circuits, e.g. green ceramic sheets
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0306—Inorganic insulating substrates, e.g. ceramic, glass
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/167—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed resistors
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/06—Thermal details
- H05K2201/068—Thermal details wherein the coefficient of thermal expansion is important
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
- H05K2201/09681—Mesh conductors, e.g. as a ground plane
Definitions
- the present invention relates to an in-vehicle electronic device.
- the circuit board structure of various sensors that output various physical quantities as electrical signals from sensing elements that detect various physical quantities and electronic circuits that control the sensing elements installed in the engine room and around the exhaust system
- the various The present invention relates to a circuit board structure of a control unit having a microprocessor arithmetic unit that receives various electrical signals from a sensor and controls various states of a vehicle.
- a ceramic hybrid substrate (hereinafter referred to as a substrate) in which a circuit is formed by forming a conductor pattern, a resistor, and a dielectric by printing on a ceramic substrate and firing them.
- Glass is blended in all paste materials that are circuit forming materials other than the above.
- the conductor pattern is blended with glass and solvent, and the resistor is blended with glass and solvent in addition to ruthenium oxide as the resistor material.
- the dielectric is a glass material itself.
- the problem is the glass paste for dielectrics. At present, there are few products that exclude lead in dielectric paste, and products that exclude lead are poor in dielectric properties and productivity and are not widely used in the industry. According to the circumstances confirmed with the glass paste manufacturer, it is technically difficult to eliminate lead from dielectric glass, and there is no plan to develop it due to high costs.
- the problem here is that a manufacturer that produces a circuit board by forming a conductor pattern, a resistor, and a dielectric by printing on a ceramic substrate as described above, suddenly in an international organization, etc. When the regulation prohibiting lead in glass is implemented, the substrate product may not be manufactured.
- LTCC substrates low temperature sintered ceramic substrates
- the LTCC substrate is attracting attention as an environmentally friendly ceramic substrate.
- the LTCC substrate has a problem that its manufacturing cost is high.
- Japanese Patent Application Laid-Open No. 2005-223226 introduces a structure for joining a ceramic substrate and a composite resin substrate, and discloses a measure for preventing warping caused by the difference between the linear expansion coefficients of the two.
- Japanese Patent Laid-Open No. 2007-208243 discloses a structure in which a metal pad layer is provided on an LTCC floor and soldered to an external substrate for mounting the LTCC substrate on another external substrate.
- Japanese Laid-Open Patent Publication No. 2006-124201 discloses a constituent material in which lead from an LTCC green sheet is excluded.
- a general circuit board configuration consists of a capacitor or IC chip in which a circuit pattern made of a conductive metal is formed on the surface of a substrate material made of an insulator, and a resistor necessary for circuit formation is printed or soldered as a chip component.
- the metal lands for mounting etc. are formed, and a protective film for protecting from the moisture and corrosive gas is formed on that portion, and the chip parts and the IC chip are mounted with solder or conductive adhesive.
- solder or conductive adhesive Such a structure is the same for a printed circuit board.
- FIG. 1 is a diagram showing a cross-sectional structure of the ceramic substrate 1.
- a conductive paste formed of glass, a solvent, or a powder of an alloy such as silver, copper, silver and palladium is used as a circuit pattern.
- the circuit pattern 3 is formed on the surface of the ceramic substrate 2 with a squeegee by directly pressing the print mask against the alumina substrate 2. Thereafter, the alumina substrate 2 is baked to volatilize the solvent contained in the paste, the printed circuit pattern 3 is fixed, and the glass component chemically reacts with impurities (flux) contained in the alumina substrate.
- the resistor 4 is also formed by printing with a printing mask a resistor paste in which a glass component and a solvent are mixed in addition to ruthenium oxide serving as a resistor material.
- the protective film 5 is similarly formed by printing glass paste or resin paste with a printing mask. Then, the solder paste 6 is printed with a mask for printing on a predetermined part, and further, an electronic component 7 such as a chip component or an IC chip is mounted, or the solder paste 6 is cured after being applied to the electronic component with a conductive adhesive. .
- a circuit pattern 3 serving as a first layer is formed on the surface of the alumina substrate 2, and a circuit pattern 3 is formed by printing a conductive paste mainly composed of a conductive metal, particularly silver, copper, or an alloy of silver and palladium, and fired.
- the dielectric layer 8 is formed by stacking and baking the dielectric paste (generally used is mostly lead glass) until a predetermined film thickness is obtained.
- the printed pattern of the dielectric 8 is formed with a via hole 9 that connects the circuit pattern 3 as the first layer and the conductor pattern of the second layer formed on the surface of the dielectric 8.
- the via hole 9 is filled and printed by printing using the same conductive metal paste as the circuit pattern 3 serving as the first layer, and is fired.
- a second-layer wiring pattern 10 to be a surface layer circuit pattern is formed by printing using the conductive paste in the same manner as the circuit pattern to be the first layer, and is fired. . Thereby, the ceramic substrate is completed.
- the resistor 4 is formed and printed by printing a resistor paste.
- the protective film 5 is also formed by printing glass or resin, and is baked or cured.
- the printed multilayer ceramic substrate 1 is completed by printing the solder 6 on the land portion serving as the opening for mounting the electronic circuit component 7 and reflowing the solder 6 after mounting the electronic component 7 such as a chip component or IC chip. To do.
- the greatest feature of the printed multilayer ceramic substrate 1 is that a circuit wiring pattern can be formed by printing, and since the structure is simple, a highly reliable and inexpensive circuit substrate can be manufactured. However, there is a limit to high-density mounting. In addition, since the number of stacked layers is practically 3 or less, when the number of circuits increases, the circuit area increases and the substrate size increases.
- the LTCC substrate is a low-temperature fired ceramic substrate, and the greatest feature of the LTCC substrate is that a circuit pattern is freely formed on a green sheet that is in a state before firing the ceramic, and is laminated in layers.
- the green sheet and the conductive paste for forming the circuit pattern are simultaneously fired, whereby a high-density mounting substrate can be formed.
- the LTCC substrate has a problem that its mechanical strength is lower than that of a conventional alumina substrate and its cost is high.
- LTCC substrate was developed on the premise that a glass material from which lead was excluded was used from the beginning of development, most LTCC green sheets 11 distributed in the market use a glass material from which lead has been excluded. Material design has been made, and it is a material that matches the environment. In recent years, LTCC boards have been used for mobile phone and automotive electronic circuit boards in accordance with the need for increased circuit configuration and miniaturization.
- the LTCC green sheet 11 is a green sheet obtained by kneading alumina powder and glass powder with a solvent. The feature is that many of the LTCC green sheets 11 are formed of glass from which lead is excluded, and the environmentally friendly technology has evolved.
- the LTCC green sheet 11 is formed with a via hole 9 for conducting a circuit by a mechanical puncher or a laser processing machine. Next, the via hole 9 is filled with a conductive paste 12 whose main component is silver, copper, an alloy of silver and palladium, or the like, by printing.
- the circuit patterns 3 and 10 designed for each layer are formed by printing with a conductor paste mainly composed of silver, copper, or an alloy of silver and palladium, and then each LTCC green sheet 11 is laminated and pressure-bonded 13. . Then, the LTCC green sheet 11 and the conductor paste 12 are simultaneously fired by firing the pressure-bonded LTCC green sheet 11 to form a high-density circuit board.
- the resistor 4 is formed and printed by printing a resistor paste.
- the protective film 5 is also formed by printing glass or resin, and is baked or cured. And the solder 6 is printed on the land part used as the opening part which mounts the electronic circuit component 7, and the LTCC board
- substrate 14 is completed by reflowing the solder 6 after mounting electronic components 7, such as a chip component and an IC chip.
- the ceramic substrate 1 is difficult to eliminate lead from the dielectric 8 printing paste, and the environmental response is delayed.
- the LTCC substrate 14 has been developed as an LTCC green sheet 11 excluding lead, and is an environmentally friendly ceramic substrate.
- an object of the present invention is to improve the productivity that is an advantage of the ceramic substrate 1, the technology that can form an inexpensive circuit board, and the environmental response of the LTCC green sheet 11 that excludes the lead of the LTCC substrate 14.
- lead elimination technology is progressing to form a dielectric layer for use in ceramic substrates, which is cheap but is behind development of technology for eliminating lead from dielectric paste. This can be achieved by substituting the LTCC green sheet that has been distributed in the market with the LTCC green sheet.
- the present invention by combining the technology of the ceramic substrate and the advantage that it is difficult to eliminate lead from the constituent material while being inexpensive, and the technology of the LTCC substrate, which is expensive, but lead elimination from the material is advanced, While eliminating lead, an effect of supplying an electronic circuit board capable of reducing cost by improving productivity can be expected.
- the cross-section figure of the conventional ceramic substrate The member block diagram of the conventional ceramic substrate.
- the manufacturing flowchart of the conventional ceramic substrate The manufacturing flow figure of the conventional LTCC board
- the manufacturing flowchart of the ceramic substrate used as another implementation plan by this invention.
- FIG. 5 is a manufacturing process diagram of the ceramic substrate 15 according to the present invention.
- the LTCC green sheet 11 has the same manufacturing process as that of a normal LTCC substrate 14, controls electrical conduction between the upper and lower layers, and forms via holes 9 for electrically connecting circuit patterns. Fills the via hole 9 with a conductor paste 12 mainly composed of silver, copper, or an alloy of silver and palladium. In this step, a wiring pattern 10 to be a predetermined second layer is formed on the surface layer by printing with a conductor paste 12 mainly composed of silver, copper, or an alloy of silver and palladium. The processing of the LTCC green sheet 11 is retained.
- the circuit pattern 3 as the first layer is printed on the surface of the alumina substrate 2 with a conductive paste, in particular, a conductive paste mainly composed of silver, copper, and an alloy of silver and palladium.
- a circuit pattern 3 is formed.
- the LTCC green sheet 11 that has been set aside is stacked 13 while aligning the positions, and a press press 13 is performed so that the LTCC green sheet 11 and the alumina substrate 2 are in close contact with each other.
- the conductor filled in the via hole formed by the LTCC green sheet 11 and the conductor paste 12, the circuit pattern 3 as the first layer, and the wiring pattern 10 formed as the surface conductor are simultaneously fired.
- the subsequent steps are the same as those of the conventional ceramic substrate 1 and the LTCC substrate 14. That is, the resistor 4 is formed and printed by printing a resistor paste. Further, the protective film 5 is also formed by printing glass or resin and firing or curing. And the solder 6 is printed on the land part used as the opening part which mounts the electronic circuit component 7, and after mounting electronic components 7, such as a chip component and an IC chip, the solder 6 is reflowed, thereby the ceramic substrate 15 of the present invention. Complete.
- LTCC green sheet 11 one layer
- the substrate thickness is increased to increase the strength, etc.
- two or more two or more. It may be used.
- the linear expansion coefficient is unbalanced, and the largest factor is the conductor paste that forms the circuit pattern 3 that is the first layer and the dielectric that covers the first layer. This is due to the difference in shrinkage and shrinkage behavior in each material when the LTCC green sheet 11 to be 8 is fired simultaneously.
- the main component of the conductor paste forming the circuit pattern 3 as the first layer is silver, copper, or an alloy of silver and palladium.
- the LTCC green sheet 11 is kneaded with alumina powder, glass powder and a solvent as described above, the volume shrinks when both are fired simultaneously, but the shrinkage start temperature and shrinkage rate are completely different. For this reason, the LTCC substrate end portion is turned up during firing.
- the conductor paste forming the circuit pattern 3 starts to shrink first, and after the conductor is sintered, the LTCC green sheet 11 It has been confirmed that the stress at the time of contraction acts on the end portion of the LTCC substrate which is a free end because the conductor contracts before the LTCC substrate.
- the LTCC green sheet 11 when the LTCC green sheet 11 was laminated on the alumina substrate 2 and baked, the LTCC end portion was not turned up. In addition, after firing the conductor paste on the entire surface of the LTCC green sheet 11, the LTCC green sheet 11 was warped in a concave shape.
- a circular or slit-shaped opening 16 is provided in a solid conductor in which a circuit pattern 3 serving as a first layer formed on the surface of the alumina substrate 2 is formed with a conductive paste, to thereby form the alumina substrate 2.
- the part which exposed was provided.
- the ceramic substrate 15 of the present invention can be formed with stable quality from the material policy.
- a description will be given with reference to FIG.
- the adhesion between the LTCC green sheet 11 and the alumina substrate 2 that is, If the adhesion strength due to the interaction between the LTCC green sheet 11 and the alumina substrate 2 is greater than the shrinkage stress generated during firing of the circuit pattern 3 forming the first layer, the circuit pattern serving as the first layer 3 is constrained by the alumina substrate 2 and the LTCC green sheet 11, and the flip-up after the LTCC green sheet 11 is baked does not occur.
- the metal oxide 18 is added to the LTCC green sheet 11.
- the conductor paste such as the alumina substrate and silver
- the metal paste is blended with the metal paste, and at the interface between the conductor paste and the alumina substrate in the reduction reaction when firing, It is known to chemically react with impurities (flux) on the alumina substrate to form a strong chemical bond, and this is used as a chemical bond 20.
- the chemical bond 20 function for bringing the conductive paste forming the circuit pattern 3 into close contact with the alumina substrate 5% or less of the metal oxide 18 serving as the nucleus of the chemical bond 20 is added to the LTCC green sheet 11. And a chemical bond function was imparted to the interface between the LTCC green sheet 11 interface and the alumina substrate 2 interface.
- the compounding amount of the metal oxide was 0.1%, 1%, 5%, and 10%, but in the compounding of 10%, the metal oxide reacts with the glass powder of LTCC, and the void is formed on the reverse LTCC substrate.
- the blending amount is preferably 5% or less because it occurs or the coefficient of linear expansion changes depending on the metal oxide and the phenomenon of swelling at the center of the LTCC substrate occurs.
- the specific metal oxide 18 is copper oxide or cuprous oxide, but the effect can be obtained in zinc oxide, nickel oxide, bismuth oxide, silver oxide, boron oxide, or the like.
- the LTCC green sheet 11 capable of eliminating lead is used as the dielectric paste for printed multilayers in which it is difficult to eliminate lead.
- LTCC green is used as another embodiment. This is a policy of using the sheet 11 as a printing paste in a paste state.
- the manufacturing method of the LTCC green sheet 11 is a green sheet obtained by kneading alumina powder and glass powder with a solvent, and can be used as a substitute for a printing paste by adjusting the amount of the solvent added.
- the circuit pattern 3 as the first layer is formed on the surface of the alumina substrate 2 by printing a conductive paste having a conductive metal, particularly silver, copper, or an alloy of silver and palladium as a main component. Then, printing is repeated until the LTCC paste obtained by kneading the alumina powder and glass powder, which are raw materials of the LTCC green sheet 11, with a solvent prepared so as to be in a paste state is used as the dielectric 8 to a predetermined film thickness. Bake. At this time, via holes 9 are formed to connect the circuit pattern 3 as the first layer and the wiring pattern 10 as the second layer formed on the surface of the dielectric 8 as the pattern of the dielectric 8.
- the via hole 9 is filled and printed by printing using the same conductive metal paste as the circuit pattern 3 which is the first layer, and is fired.
- the second layer wiring pattern 10 to be the surface layer wiring pattern 10 is formed by printing using the conductor paste in the same manner as the circuit pattern 3 as the first layer. Bake.
- the resistor 4 is formed and printed by printing a resistor paste.
- the protective film 5 is also formed by printing glass or resin, and is baked or cured.
- the solder 6 is printed on the land part used as the opening part which mounts the electronic circuit component 7, and after mounting electronic components 7, such as a chip component and an IC chip, the solder 6 is reflowed, thereby the ceramic substrate 15 of the present invention. Complete.
- the ceramic substrate 15 in the present invention can be formed without requiring the LTCC dedicated equipment. Since there is no need for special equipment if there is a printing machine and a firing furnace, it is possible to form a dielectric layer that is inexpensive and excludes lead, and therefore it is possible to manufacture a ceramic substrate that is environmentally friendly.
- the ceramic substrate 15 As a product example using the ceramic substrate 15 according to the present invention, it is suitable for an electronic circuit for automobiles. In addition, it is possible to develop a multilayer ceramic substrate that excludes lead in an air flow meter, temperature sensor, pressure sensor, engine control unit, humidity sensor, exhaust temperature sensor, pressure sensor, and small power module. In addition, as a highly reliable ceramic substrate having the mechanical strength of a conventional ceramic substrate, a highly reliable ceramic substrate that can withstand harsh environments while being environmentally friendly can be supplied.
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- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
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- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Production Of Multi-Layered Print Wiring Board (AREA)
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Abstract
Description
2 アルミナ基板
3 回路パターン
4 抵抗体
5 保護膜
6 はんだ
7 電子部品
8 誘電体
9 ビアホール
10 配線パターン
11 LTCCグリーンシート
12 導体ペースト
13 積層,圧着工程
14 LTCC基板
15 本発明のセラミック基板
16 円形,スリット状の抜き部分形状
17 網目,格子状の抜き部分
18 金属酸化物
19 LTCCペースト
20 ケミカルボンド
Claims (10)
- 焼結したセラミック基体と、前記セラミック基体の表面に形成された導電性金属の導体ペーストからなる第一の回路配線パターンと、前記第一の回路配線パターンの表層に形成された誘電体からなる絶縁層と、前記絶縁層の表層に第二の回路配線パターンと回路搭載部品を搭載するランドが形成された導体パターンと抵抗体とが形成されており、前記回路搭載部品を搭載するランド部分以外を保護膜でコートし、電子回路部品を導電性接着剤で接続したセラミック基板において、
前記誘電体は、アルミナ粉末とガラス粉末を溶剤で混練した低温焼成セラミック基板のグリーンシートからなることを特徴とする多層セラミック基板。 - 焼結したセラミック基体と、前記セラミック基体の表面に導電性金属から成る導体を印刷により形成した回路配線パターンと、
ビア導体となる貫通孔を設けられたアルミナ粉末とガラス粉末を溶剤で混練した低温焼成セラミック基板のグリーンシートと、前記グリーンシートは、前記貫通孔を導体ペーストで充填し、前記低温焼成セラミック基板のグリーンシートの表層に回路パターンを導体ペーストにて印刷で形成されており、
前記低温焼成セラミック基板のグリーンシートを前記セラミック基体に多層積層し、前記多層に積層された低温焼成セラミック基板のグリーンシートの最上層には、回路配線パターンと回路搭載部品を搭載するランドが形成された導体パターンと抵抗体とが形成されており、前記回路搭載部品を搭載するランド部分以外を保護膜でコートし、電子回路部品を導電性接着剤で接続した多層セラミック基板。 - 請求項1に記載の多層セラミック基板において、
前記低温焼成セラミック基板のグリーンシートは鉛を含有しないガラス粉末材料で構成されたことを特徴とする多層セラミック基板。 - 請求項1に記載の多層セラミック基板において、
前記第一の回路配線パターンに円形あるいはスリット状の開口を形成し、前記セラミック基体の一部を露出させたことを特徴とするセラミック基板、あるいは、網目状,格子状とすることで、基体となるアルミナ基板と前記、導電性金属より形成される第一層配線パターンを挟む誘電体層を直接、接触するような部分的抜き形状を第一層に設けた配線パターンとしたことを特徴とする多層セラミック基板。 - 請求項1に記載の多層セラミック基板において、
前記第一の回路配線パターンを網目状あるいは格子状とすることで、前記セラミック基体の一部を露出させ、前記低温焼成セラミック基板のグリーンシートと前記第一の回路配線パターンとを直接接触するための部分的抜き形状を設けたことを特徴とする多層セラミック基板。 - 請求項1に記載の多層セラミック基板において、
前記低温焼成セラミック基板のグリーンシートに金属酸化物を配合したことを特徴とする多層セラミック基板。 - 請求項5に記載の多層セラミック基板において、
前記低温焼成セラミック基板のグリーンシートに配合される金属酸化物は、酸化銅,亜酸化銅,酸化亜鉛,酸化ニッケル,酸化ビスマス,酸化銀,酸化ホウ素であることを特徴とする多層セラミック基板。 - 請求項5に記載の多層セラミック基板において、
前記低温焼成セラミック基板のグリーンシートに配合される金属酸化物の配合率は5%以下であることを特徴とする多層セラミック基板。 - 焼結したセラミック基体と、前記セラミック基体の表面に形成された導電性金属の導体ペーストからなる第一の回路配線パターンと、前記第一の回路配線パターンの表層に形成された誘電体からなる絶縁層と、前記絶縁層の表層に第二の回路配線パターン、回路搭載部品を搭載するランドが形成された導体パターン、抵抗体が形成されており、前記回路搭載部品を搭載するランド部分以外を保護膜でコートし、電子回路部品を導電性接着剤で接続したセラミック基板において、
前記誘電体は、アルミナ粉末とガラス粉末を溶剤で溶いた低温焼成セラミックペーストで形成したことを特徴とする多層セラミック基板。 - 請求項1乃至8のいずれかに記載の多層セラミック基板において、
前記セラミック基板を自動車のエンジンルーム、あるいは、排気系周囲に搭載されるセンサ、あるいは、エンジンコントロールユニットに搭載したことを特徴とする車載電子機器。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN2011800361540A CN103026806A (zh) | 2010-07-30 | 2011-07-20 | 用于车载用电子设备的基板构造 |
EP11812334.8A EP2600703A1 (en) | 2010-07-30 | 2011-07-20 | Substrate structure for vehicle-mounting electronic device |
US13/812,141 US20130182397A1 (en) | 2010-07-30 | 2011-07-20 | Circuit Board Structure Used for Vehicle-Mounted Electronic Device |
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JP2010171312A JP5463235B2 (ja) | 2010-07-30 | 2010-07-30 | 車載用電子機器に用いる基板構造 |
JP2010-171312 | 2010-07-30 |
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WO2012014743A1 true WO2012014743A1 (ja) | 2012-02-02 |
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EP (1) | EP2600703A1 (ja) |
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EP2600703A1 (en) | 2013-06-05 |
JP5463235B2 (ja) | 2014-04-09 |
CN103026806A (zh) | 2013-04-03 |
JP2012033664A (ja) | 2012-02-16 |
US20130182397A1 (en) | 2013-07-18 |
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