Patent ID: 6386815
Filing Date: 2002-05-14
Classification: H01L,Y10S,Y10T

Abstract:
In a push-up pin device for lifting semiconductor chips off a tape, said push-up pin device having a plurality of changeable pin holders each of different pin pitch, the improvement wherein the push-up pin device comprises a hollow cylindrical housing having a bottom plate, which receives thereon a composite cam including a plurality of cylindrical cams having different diameters and respective upward projections having a phase difference from one another, and a plurality of cylindrical pin holders of different pin pitch, each provided for a corresponding one of the cylindrical cams, the pin holders being separately rotatably and vertically movable in said cylindrical housing and having a plurality of push-up pins at an upper portion and a plurality of downward projections which have a phase difference from one another; at least part of the pin holder positioned above the composite cam being in contact with the composite cam.