Pick-up apparatus for semiconductor chips
AssigneeNEC Corporation
InventorKouzou Tawara
Life of this patent
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Abstract
A pick-up apparatus for picking up semiconductor chips comprising an integrated or a separately rotatable composite cam formed by a plurality of cylindrical cams, and a plurality of cylindrical pin holders having a plurality of push-up pins, and at least part of the pin holder is in contact with the composite cam. The rotation of the composite cam selects one of the pin holders suited for pushing up a desired semiconductor chip, and the counter rotation selects another pin holder suited for another semiconductor chip having a different size. In this manner, a plurality of semiconductor chips having different sizes can be properly picked up without replacing the pin holder.
Claims4
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.
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 formed by a plurality of separately rotatable 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 pitch, each provided for a corresponding one of the cylindrical cams, the pin holders being separately rotatably and vertically movable within said cylindrical housing and having a plurality of push-up pins at an upper portion and a plurality of downward projections having 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.
Dependencies are inferred from the claim text.