Patent ID: 8801352
Filing Date: 2014-08-12
Classification: H01L

Abstract:
1. A method for removing semiconductor die from wafer tape, comprising: mounting a wafer ring to a mounting frame, the wafer ring having wafer tape and one or more dies attached to the wafer tape; aligning an ejector pin assembly under a target die of the one or more dies to be removed from the wafer tape, the ejector pin assembly comprising a vacuum housing, an ejector pin, an ejector pin housing having an activation mechanism to extend the ejector pin out from the ejector pin housing, a suction plate, and an aperture formed in the suction plate in alignment with the ejector pin; generating a vacuum in the vacuum housing to draw the tape against a surface of the suction plate via a suction force applied through the aperture; and extending the ejector pin out from the ejector pin housing through the vacuum housing and through the aperture of the suction plate to push against a portion of the wafer tape at a backside of the target die and push said portion of the wafer tape and said target die away from the suction plate, wherein the vacuum force is maintained through the aperture while the ejector pin extends through the aperture to draw the wafer tape toward the suction plate by the suction force of the vacuum applied through the aperture to pull said portion of the wafer tape from the backside of the target die and release said portion of the wafer tape from the backside of the target die while the ejector pin continues to extend and push against the backside of the target die.