Patent ID: 7977580
Filing Date: 2011-07-12
Classification: H01L,H05K,Y10T

Abstract:
1. An intermediate multilayer wiring board product comprising: a stack of a plurality of resin insulating layers, the stack comprising: a product forming region comprising a plurality of product portions arranged along a major surface of the stack, each of the plurality of product portions to become a product of the multilayer wiring board; and a frame portion surrounding the product forming region; a first conductor layer formed on at least one of the plurality of resin insulating layers within each of the plurality of product portions; and a second conductor layer formed on at least one of the plurality of resin insulating layers within the frame portion; wherein the frame portion has a plurality of cuts completely penetrating the frame portion in a thickness direction thereof, the plurality of cuts being arranged at substantially equal intervals; wherein at least one of the plurality of cuts is a slit extending along an extension of a cutting line set along a contour line of a respective one of the plurality of product portions and having a width substantially equal to an interval between contour lines of adjacent product portions.