In a semiconductor device, a first skirt portion molded from a first mold resin and a second skirt portion molded from a second mold resin are provided on a heat dissipating surface of a lead frame. Also, a thinly-molded portion is molded integrally with the second skirt portion from the second mold resin. According to this kind of configuration, adhesion between the thinly-molded portion and lead frame is high, and the semiconductor device with excellent heat dissipation and insulation is obtained.

An electronic component package includes a frame having a cavity, an electronic component disposed in the cavity of the frame, a first metal layer disposed on an inner wall of the cavity of the frame, an encapsulant encapsulating the electronic component, and a redistribution layer disposed below the frame and the electronic component.

A base-attached encapsulant for semiconductor encapsulation is used for collectively encapsulating a device-mounted surface of the semiconductor device-mounted substrate having semiconductor devices mounted thereon or a device-formed surface of a semiconductor device-formed wafer having semiconductor devices formed thereon. The base-attached encapsulant has a base and an encapsulating resin layer containing an uncured or semi-cured thermosetting resin component formed onto one of the surfaces of the base, and a linear expansion coefficient α.sup.1 of the semiconductor device to be encapsulated by the base-attached encapsulant, a linear expansion coefficient α.sup.2 of a cured product of the encapsulating resin layer, and a linear expansion coefficient α.sup.3 of the base satisfy both of the following formula (1) and (2);

α.sup.1<α.sup.3<α.sup.2   (1)

−2<α.sup.1+α.sup.2−2α.sup.3<2   (2)

wherein the unit of the linear expansion coefficient is ppm/K. The base-attached encapsulant for semiconductor encapsulation which suppress package warpage even if a package with a large area is encapsulated.

The present disclosure provides a package device and a method of manufacturing the same. The package device includes a supporting member, a main component, a sealant, and a conductive encapsulant. The supporting member includes a plurality of grounding contacts. The main component is mounted on the supporting member. The sealant covers the main component. The conductive encapsulant encases the sealant and the grounding contacts exposed through the sealant for EMI shielding.

A resin composition comprising one or more cyanate compounds (A) selected from a group consisting of a naphthol aralkyl-based cyanate compound, a naphthylene ether-based cyanate compound, a xylene resin-based cyanate compound, a trisphenolmethane-based cyanate compound, and an adamantane skeleton-based cyanate compound; a polymaleimide compound (B) represented by general formula (1); and a filler (C).

The present invention provides a resin composition including: (A) a silicone resin containing a constitutional unit shown by the following composition formula (1) and having a weight average molecular weight of 3,000 to 500,000; (B) an epoxy resin-curing agent; and (C) a filler; wherein the mass fraction of the component (C) is 50 to 95% by mass based on the total mass. This can provide a resin composition that can mold a wafer in a lump, has good molding properties particularly to a thin-film wafer having a large diameter, gives low-warping properties, as well as good wafer protection properties, high reliability, and good heat resistance after molding, can perform a molding process favorably, and can be used for wafer level packaging favorably.

##STR00001##

A semiconductor package includes a substrate having at least one recessed portion, a semiconductor device located on a surface of the substrate, the surface having the at least one recessed portion, and a resin insulating layer covering the semiconductor device.

An adhesive for a semiconductor, comprising an epoxy resin, a curing agent, and a compound having a group represented by the following formula (1): ##STR00001##
wherein R.sup.1 represents an electron-donating group.

A circuit module includes a wiring substrate having a mount surface, a conductor pattern, and an insulating protective layer, the mount surface having first and second areas, the conductor pattern being formed along a boundary between the first and second areas on the mount surface, the insulating protective layer being formed on the mount surface, the insulating protective layer covering the mount surface and the conductor pattern; a plurality of electronic components mounted on the first and second areas; an insulating sealing layer having a trench, the insulating sealing layer covering the plurality of electronic components, the trench having a depth such that the trench penetrates the protective layer to reach a surface of the conductive pattern; and a conductive shield having first and second shield portions, the first shield portion covering an outer surface of the sealing layer, the second shield portion being electrically connected to the conductor pattern.

Disclosed herein is an electronic circuit package includes: a substrate having a power supply pattern; an electronic component mounted on a surface of the substrate; a magnetic mold resin formed of a composite magnetic material including a thermosetting resin material and a magnetic filler, the magnetic mold resin covering the surface of the substrate so as to embed therein the electronic component; and a metal film connected to the power supply pattern and covering at least a top surface of the magnetic mold resin. A volume resistance value of the magnetic mold resin is equal to or larger than 10.sup.10Ω, and a resistance value at an interface between the top surface of the magnetic mold resin and the metal film is equal to or larger than 10.sup.6Ω.