Patent ID: 6592325
Filing Date: 2003-07-15
Classification: H01L

Abstract:
An air-suspended die sorter, comprising:a trunk having a through hole having a first end and second ends; a first fitting connected with the trunk and capable of having air contact with the through hole; a shank holder shaft having a piston portion, an air-suspended portion and an air passage going through an axis of the shank holder shaft, the shank holder shaft fitting in the through hole and movable along the axis, the air-suspended portion being provided on a side of the second end of the through hole; a lower cap provided on the trunk forming a hollow space between the lower cap and the trunk such that the air-suspended portion of the shaft holder is located in the hollow space and a first air chamber is formed between the air-suspended portion and the trunk; a second fitting connected with the trunk and capable of having air contact with the first air chamber; a vacuum device connected with the first fitting and providing a low-pressure state at the first end of the through hole and in the air passage for die pick-up operation; and a pneumatic regulator, having one end and another end connected with the second fitting and a pressure source, respectively, for regulating a pressure between the air-suspended portion and the trunk and providing an air-suspended state for the air-suspended portion and the shank holder shaft.