Patent ID: 7948059
Filing Date: 2011-05-24
Classification: H01L

Abstract:
1. A semiconductor device comprising: a ceramic substrate; a surface mount component mounted on said ceramic substrate; and sealing resin for sealing said surface mount component mounted on said ceramic substrate, said sealing resin having a thickness equal to or less than a thickness of said ceramic substrate, wherein, in a manufacturing process thereof, said ceramic substrate is composed of a multiple piece substrate in which dividing grooves for division into respective pieces are formed on both front and rear surfaces in advance, a plurality of said surface mount components are mounted on said multiple piece substrate and sealed collectively by said sealing resin, and then said ceramic substrate and said sealing resin, which does not contain any dividing groove, are divided along said dividing grooves of said ceramic substrate by applying tensile stress in such a direction that the dividing grooves of the rear surface of the ceramic substrate become principal stress surfaces, thereby manufacturing respective pieces having dimensions defined by said ceramic substrate, in this division, cracks are extended from the dividing grooves of the rear surface of the ceramic substrate, in the thickness direction of the ceramic substrate, penetrating the sealing resin, which does not contain any dividing groove, thereby dividing the sealing resin, and when the shortest distance from an end on the front surface of said ceramic substrate to an end of said surface mount component is set to “a” μm, a thickness of said ceramic substrate is set to “b” μm, and sum of depths of the dividing grooves on the front and rear surfaces of said ceramic substrate is set to “c” μm, a relationship of a≧269×c/b+151 is established.