Patent ID: 7115435
Filing Date: 2006-10-03
Classification: G03F,H01L,H05K

Abstract:
1. A method for manufacturing a wiring substrate including a wiring integrated portion in which a resin dielectric layer and a conductor layer are alternately laminated, said manufacturing method comprising steps of: laminating said conductor layer and said resin dielectric layer on a supporting substrate with an outermost dielectric layer; forming a positioning mark, using an irradiating laser, on a main surface of said resin dielectric layer; and irradiating said positioning mark with light from the main surface side of said resin dielectric layer and detecting light reflected from said main surface, and identifying a position of a wiring substrate workpiece based on said detecting of light reflected from said surface, wherein in the step of forming the positioning mark, said irradiating laser is projected onto a selected excavation area by shifting the laser irradiation in position so as to provide overlapping in a circumferential direction and in a radial direction to produce a ring-like excavation area forming said positioning mark, the positioning mark comprising a groove produced by removing an annular portion of said resin dielectric layer so as to expose said conductor layer within the groove.