Patent ID: 7712177
Filing Date: 2010-05-11
Classification: B08B,Y10T

Abstract:
1. A cleaning sheet for removing foreign matter adhering on a tip of a probe needle of a probe card, comprising a cleaning layer having a surface, the surface of the cleaning layer forming one surface of the cleaning sheet, wherein the cleaning layer contains a urethane polymer and a vinyl polymer comprising an acrylic polymer, wherein said cleaning layer contains additives in amounts within a range in which the probe needle is not worn, wherein the cleaning layer has an initial elastic modulus within a range of 0.5-100 N/mm 2 and is adapted to receive penetrating probe needles and remove and retain impurities from a tip of said probe needles such that there will be no re-adhering of the foreign matter or the cleaning layer material on the probe needle after the cleaning operation, and wherein said cleaning layer has a thickness within a range of 10 to 500 μm.