公开(公告)号：US3568296A

公开(公告)日：1971-03-09

申请号：US3568296D

申请日：1969-01-14

Applicant: IBM

Inventor： CUTILLO JOSEPH G ,  LINSKY JOHN E

IPC: H05K3/00 ,  H05K3/02 ,  B23P17/00 ,  H05K3/04

CPC classification number: H05K3/0047 ,  H05K3/022 ,  H05K2203/135 ,  H05K2203/1383 ,  Y10T29/49165 ,  Y10T29/49812 ,  Y10T29/49982

Abstract: A PROCESS FOR DRILLING HOLES WITH REDUCED BURR SIZE AT THE EXIT EDGES OF THE HOLES WIHICH INCLUDES THE STEPS OF ELECTTROPHORETICALLY DEPOSITING A POLYMERIC COATING ON THE EXIT SURFACE OF THE DRILLED MEMBER PRIOR TO DRILLING, CURING THE COATING, RILLING THE HOLES AND THEREAFTER REMOVING THE CURED COATING.