摘要:
The present invention provides a novel epoxy resin-based curable composition suitable for use as an encapsulating resin composition for semiconductor devices capable of being highly resistant against crack formation with low internal stress by curing and yet having very high heat conductivity and maintaining high glass transition temperature. The inventive composition comprises (a) 100 parts by weight of a curable epoxy resin blend which is a mixture of an epoxy resin and a curing agent therefor, (b) from 5 to 100 parts by weight of a block copolymer composed of at least one segment of an aromatic polymeric moiety, phenyl novolac, and at least one segment of an organopolysiloxane moiety having 30 to 200 silicon atoms and bonded to the aromatic polymeric moiety through a carbon-to-silicon linkage, and optionally (c) an inorganic filler which is preferably a silica filler such as powdered quartz in an amount not exceeding 1000 parts by weight.
摘要:
An epoxy resin composition which comprises a curable epoxy resin, a curing agent, an inorganic filler, and at least one copolymer selected from copolymers obtained by an addition reaction between aromatic polymers containing one or more epoxy groups and one or more alkenyl groups and the specific organopolysiloxanes; copolymers obtained by an addition reaction between aromatic polymers containing one or more epoxy groups and the specific amino group-containing organopolysiloxanes.
摘要:
An epoxy resin composition which comprises a curable epoxy resin, a curing agent, an inorganic filler, and at least one copolymer selected from copolymers obtained by an addition reaction between aromatic polymers containing one or more epoxy groups and one or more alkenyl groups and the specific organopolysiloxanes; copolymers obtained by an addition reaction between aromatic polymers containing one or more epoxy groups and the specific amino group-containing organopolysiloxanes.
摘要:
An epoxy resin-based composition suitable for encapsulation of semiconductor devices is proposed. The resin composition is capable of giving a cured resin encapsulation highly resistant against crack formation by virtue of the unique ingredient therein, in addition to the thermally curable epoxy resin and an inorganic filler, which is a combination of an organopolysiloxane having a hydrocarbon group substituted by certain functional groups, e.g. glycidyl, amino, mercapto and the like, and a block copolymer composed of the segments of a polymeric aromatic moiety and segments of an organopolysiloxane moiety.
摘要:
An epoxy resin composition which is adapted for use as an encapsulator of electronic or electric parts and which comprises an epoxy resin and a curing agent for the epoxy resin. A modified polymer obtained by reaction between an aromatic polymer and a fluorine-containing material is added to the epoxy resin, so that good characteristic properties are imparted to the resultant cured product.
摘要:
A curable epoxy resin is blended with (a) an alkenyl group-containing epoxidized novolak resin/organopolysiloxane copolymer and (b) a polyimide resin in addition to a curing agent and an inorganic filler. The resulting epoxy resin composition can be cured both under moisture-free conditions and even under moist conditions without inducing a crack. It is suitable for the encapsulation of semiconductor devices as well as for molding and powder coating.
摘要:
A conductive powder having an organic silicon polymer layer on the surface of each particle and a metal layer enclosing the silicon polymer layer possesses a stronger bond between the particle base and the metal even at elevated temperature and exhibits a high and stable conductivity and heat resistance.
摘要:
A semiconductor laser device suitable as a light source for an optical disk may be operated at a low operating current with low noise for the 780 nm band. The device comprises: a certain conduction type Ga.sub.1-Y1 Al.sub.Y1 As first light guide layer, a Ga.sub.1-Y2 Al.sub.Y2 As second light guide layer of said certain conduction type, or an In.sub.0.5 Ga.sub.0.5 P or an In.sub.0.5 (GaAl).sub.0.5 P or an InGaAsP second light guide layer, successively formed one upon another at least in one side of the principal plane of an active layer; an opposite conduction type Ga.sub.1-Z Al.sub.Z As current blocking layer formed on the second light guide layer and provided with a stripe-like window; and a Ga.sub.1-Y3 Al.sub.Y3 As cladding layer of the same conduction type as the light guide layers formed on the stripe-like window. The relations of Z>Y3>Y2 and Y1>Y2 define the AlAs mole fractions.
摘要:
Organic silicon compounds comprising in the molecule thereof, a polysilane structural unit: -(R.sup.1 R.sup.2 Si).sub.n - and a structural unit: R.sup.3.sub.a SiO.sub.(4-a)/2 absorb UV in the range of 300-400 nm and are well soluble in organic solvent. These compounds are useful UV absorbers for cosmetic compositions.
摘要:
A laser chip is directly disposed on a support member through a mounting arrangement and a support member, the laser chip, and peripheral parts thereof are integrally sealed within a transparent plastic resin. In this structure, without requiring expensive materials and parts, a semiconductor laser apparatus may be manufactured by using the same materials and process as in the ordinary plastic-sealed LED, so that the cost may be reduced significantly.