Abstract: A metal-based mounting board according to the present invention includes: a metal-based circuit board including a metal substrate through which a through-hole is provided along a thickness direction thereof, an insulating film provided on the metal substrate and a metal film provided on the insulating film, wherein the through-hole opens on a surface of the metal film on the opposite side of the metal substrate via the insulating film and the metal film; an electronic component connected to the metal film, the electronic component including an electronic component main body and a conductive leg portion electrically connected to the electronic component main body and inserted into the through-hole; and an insulating portion provided at least between the leg portion locating inside the through-hole and the metal substrate, and having a function of preventing them from making contact with each other.

Abstract: A metal-based mounting board according to the present invention includes: a metal-based circuit board including a metal substrate having a first surface and a second surface opposite to the first surface, an insulating film provided on the first surface of the metal substrate and a metal film provided on the insulating film; and an electronic component provided on the metal film of the metal-based circuit board, wherein in the case where within the metal substrate, a region which overlaps with a collection of a plurality of lines each having an angle of 45° or less with respect to a normal line of the metal-based mounting board, the lines each passing through a surface of the electronic component facing the metal film, is defined as a first region, and a region other than the first region is defined as a second region, a groove is provided within the second region, but is not provided within the first region.

Abstract: The metal-based mounting board includes: a metal-based circuit board including a metal substrate having a first surface and a second surface, an insulating film provided on the first surface and a metal film provided on the insulating film; and an electronic component provided on the metal film of the metal-based circuit board. Within the metal substrate, a region which overlaps with a collection of a plurality of lines each having an angle of 45° or less with respect to a normal line of the metal-based mounting board, the lines each passing through a surface of the electronic component facing the metal film, is defined as a first region. A region other than the first region is defined as a second region. At least one groove is provided within the first region so as to surround the electronic component in a planar view of the metal-based mounting board.

Abstract: The present invention provides an epoxy resin composition for sealing that demonstrates favorable adhesion to a copper lead frame in which oxidation has progressed and has superior mold release and continuous moldability. The epoxy resin composition for sealing includes (A) an epoxy resin, (B) a phenolic resin-based curing agent, (C) an inorganic filler, and (D) a curing accelerator. The curing accelerator (D) has an average particle diameter of 10 ?m or less, and the ratio of particles having a particle diameter in excess of 20 ?m is 1% by weight or less. Also, the curing accelerator (D) includes at least one type of curing accelerator selected from the group consisting of a phosphobetaine compound having a specific structure; adduct of a phosphine compound having a specific structure, and quinone compound; and an adduct of a phosphonium compound having a specific structure, and a silane compound.

Abstract: The present invention provides an epoxy resin composition for sealing that demonstrates favorable adhesion to a copper lead frame in which oxidation has progressed and has superior mold release and continuous moldability. The epoxy resin composition for sealing includes (A) an epoxy resin, (B) a phenolic resin-based curing agent, (C) an inorganic filler, and (D) a curing accelerator. The curing accelerator (D) has an average particle diameter of 10 ?m or less, and the ratio of particles having a particle diameter in excess of 20 ?m is 1% by weight or less. Also, the curing accelerator (D) includes at least one type of curing accelerator selected from the group consisting of a phosphobetaine compound having a specific structure; adduct of a phosphine compound having a specific structure, and quinone compound; and an adduct of a phosphonium compound having a specific structure, and a silane compound.