Patent ID: 8048479
Filing Date: 2011-11-01
Classification: H01L,H01R,H05K,Y10T

Abstract:
1. A method for placing material onto a target board by means of a transfer board having a surface including a plurality of blind holes, the method comprising: (A) immersing the surface of the transfer board including the plurality of blind holes into a material bath in an orientation such that each opening of each blind hole faces the material bath and each bottom of each blind hole is opposite each respective opening, the material bath comprising the material in liquid form, wherein a first pressure acts on the material bath and a second pressure acts in the blind holes, and the first pressure and the second pressure are substantially equal during immersion; (B) after immersion, generating and controlling a pressure difference between the first pressure acting on the material bath and the second pressure in the blind holes, the first pressure being higher than the second pressure, so that the blind holes of the transfer board are filled partially with the liquid material such that an unfilled volume remains in a bottom part of each blind hole adjacent the bottom of each blind hole, wherein generating and controlling the pressure after immersion is done by operation of a pressure setting unit and the controlled pressure difference determines the size of the unfilled volume; (C) extracting the transfer board from the material bath and maintaining the transfer board in the orientation such that the blind holes remain partially filled and the unfilled volume remains in the bottom part of each blind hole adjacent the bottom of each blind hole; and (D) positioning the surface of the transfer board including the plurality of blind holes above and opposite to the target board, the material being expelled from the blind holes, such that the material touches the target board.