摘要:
A paste for via-hole filling is provided, and the paste comprises at least (a) 30-70 volume % of conductive particles whose average diameter ranges from 0.5 to 20µm and whose specific surface area ranges from 0.05 to 1.5m 2 /g, and (b) 70-30 volume % of resin comprising at least 10 weight % of epoxy resin comprising at least one epoxy group per molecule, in which the total amount of a hydroxyl group, an amino group and a carboxyl group is not more than 5 mol% of the epoxy group, and the epoxy equivalent ranges from 100 to 350g/eq. The conductive paste for filling via-holes and a printed circuit board (104) comprising thereof can be used to provide an inner-via-hole connection (103) between electrode layers (102) without using a through-hole plating technique.
摘要:
An improved semiconductor unit package method is disclosed. This method is implemented by a semiconductor device having an electrode pad, a substrate having a terminal electrode, a bump electrode formed on the electrode pad, a conductive adhesion layer with flexibility, and an encapsulating layer formed by curing a composition the viscosity and thixotropy index of which are below 100 Pa · s and below 1.1, respectively. Such a composition essentially consists of (A) a resin binder that contains, for example, a polyepoxide, an acid anhydride, and a rheology modifier and (B) a filler. The rheology modifier is one capable of impeding interaction between a free acid contained in the acid anhydride and a polar group at the surface of the filler. An encapsulant with improved flowability is used, so that the encapsulant readily flows and spreads to fill a gap between the semiconductor device and the substrate with no air bubbles. This achieves semiconductor unit packages with high reliability and productivity.
摘要:
An improved semiconductor unit package is disclosed. This package is implemented by a semiconductor device having an electrode pad, a substrate having a terminal electrode, a bump electrode formed on the electrode pad, a conductive adhesion layer with flexibility, and an encapsulating layer formed by curing a composition the viscosity and thixotropy index of which are below 100 Pa·s and below 1.1, respectively. Such a composition essentially consists of (A) a resin binder that contains, for example, a polyepoxide, an acid anhydride, and a rheology modifier and (B) a filler. The rheology modifier is one capable of impeding interaction between a free acid contained in the acid anhydride and a polar group at the surface of the filler. An encapsulant with improved flowability is used, so that the encapsulant readily flows and spreads to fill a gap between the semiconductor device and the substrate with no air bubbles. This achieves semiconductor unit packages with high reliability and productivity.
摘要:
An improved semiconductor unit package is implemented by a semiconductor device having an electrode pad (2), a substrate (6) having a terminal electrode (5), a bump electrode (3) formed on the electrode pad (2), a conductive adhesion layer (4) with flexibility, and an encapsulating layer (7) formed by curing a composition the viscosity and thixotropy index of which are below 100 Pa·s and below 1.1, respectively. Such a composition essentially consists of (A) a resin binder that contains, for example, a polyepoxide, an acid anhydride, and a rheology modifier and (B) a filler. The rheology modifier is one capable of impeding interaction between a free acid contained in the acid anhydride and a polar group at the surface of the filler. An encapsulant (7) with improved flowability is used, so that the encapsulant (7) readily flows and spreads to fill a gap between the semiconductor device (1) and the substrate (6) with no air bubbles. This achieves semiconductor unit packages with high reliability and productivity.
摘要:
This invention aims to offer a transparent touch panel that functions with a soft touching pressure by a pen or a finger, at the same time assures a long operating life. The transparent touch panel comprises a base plate having a transparent electro conductive layer, a top plate having a transparent electro concuctive layer, and a plurality of dot spacers located in between the base plate and the top plate. By a touch pressure given from the outer surface of the top plate, the transparent electro conductive layer placed in the top plate touches to the transparent electro conductive layer placed in the base plate, and the place touched is detected. What this touch panel specifically features is that it comprises dot spacers made of a composite resin containing a flexible modified epoxy resin. Hardness of the dot spacer is preferably not more than 95 according to JIS-K6301-A.
摘要:
The present invention is directed to a polymer electrolyte fuel cell including: a hydrogen ion conductive polymer electrolyte membrane; a pair of electrodes sandwiching the membrane; a pair of conductive separators each having a gas flow channel means, one of which supplies a fuel gas to one of the electrodes and the other supplies an oxidant gas to the other electrode; and gaskets, each of which is sandwiched between the conductive separator and the hydrogen ion conductive polymer electrolyte membrane to surround the periphery of the electrode and the gas flow channel means, wherein a gram of the conductive separator or the gasket, which is kept immersed in water of 80 to 100°C for 50 hours, leaches into the water not more than 300 µg of TOC, not more than 50 µg of ammonium ion, not more than 50 µg of chloride ion, not more than 20 µg of bromide ion and not more than 10 µg of sulfite ion.
摘要:
The present invention is directed to a polymer electrolyte fuel cell including: a hydrogen ion conductive polymer electrolyte membrane; a pair of electrodes sandwiching the membrane; a pair of conductive separators each having a gas flow channel means, one of which supplies a fuel gas to one of the electrodes and the other supplies an oxidant gas to the other electrode; and gaskets, each of which is sandwiched between the conductive separator and the hydrogen ion conductive polymer electrolyte membrane to surround the periphery of the electrode and the gas flow channel means, wherein a gram of the conductive separator or the gasket, which is kept immersed in water of 80 to 100°C for 50 hours, leaches into the water not more than 300 µg of TOC, not more than 50 µg of ammonium ion, not more than 50 µg of chloride ion, not more than 20 µg of bromide ion and not more than 10 µg of sulfite ion.
摘要:
An improved semiconductor unit package method is disclosed. This method is implemented by a semiconductor device having an electrode pad, a substrate having a terminal electrode, a bump electrode formed on the electrode pad, a conductive adhesion layer with flexibility, and an encapsulating layer formed by curing a composition the viscosity and thixotropy index of which are below 100 Pa . s and below 1.1, respectively. Such a composition essentially consists of (A) a resin binder that contains, for example, a polyepoxide, an acid anhydride, and a rheology modifier and (B) a filler. The rheology modifier is one capable of impeding interaction between a free acid contained in the acid anhydride and a polar group at the surface of the filler. An encapsulant with improved flowability is used, so that the encapsulant readily flows and spreads to fill a gap between the semiconductor device and the substrate with no air bubbles. This achieves semiconductor unit packages with high reliability and productivity.
摘要:
An improved semiconductor unit package method is disclosed. This method is implemented by a semiconductor device having an electrode pad, a substrate having a terminal electrode, a bump electrode formed on the electrode pad, a conductive adhesion layer with flexibility, and an encapsulating layer formed by curing a composition the viscosity and thixotropy index of which are below 100 Pa · s and below 1.1, respectively. Such a composition essentially consists of (A) a resin binder that contains, for example, a polyepoxide, an acid anhydride, and a rheology modifier and (B) a filler. The rheology modifier is one capable of impeding interaction between a free acid contained in the acid anhydride and a polar group at the surface of the filler. An encapsulant with improved flowability is used, so that the encapsulant readily flows and spreads to fill a gap between the semiconductor device and the substrate with no air bubbles. This achieves semiconductor unit packages with high reliability and productivity.