Patent ID: 6033994
Filing Date: 2000-03-07
Classification: B08B,H01L

Abstract:
A device for deprocessing semiconductor chips comprising:a wet sink for containing a bath of a hydraulic fluid;at least one compression wave emitter disposed in said wet sink for causing a compression wave in said hydraulic fluid contained in said wet sink; anda container containing a corrosive chemical agent in which a semiconductor chip to be deprocessed is placed, said corrosive chemical agent being effective to loosen or undercut material deposited on said semiconductor chip that forms semiconductor structures on said chip;wherein said container containing said corrosive chemical agent is at least partially immersed in said hydraulic fluid and allows said compression wave to propagate from said hydraulic fluid to said corrosive chemical agent to impact said semiconductor chip; andwherein said at least one compression wave emitter emits said compression wave with sufficient amplitude to dislodge said material deposited on said semiconductor chip and loosened or undercut by said corrosive chemical agent.