A punch press machine for piercing a so-called green sheet made from a ceramic compound formed as a thin tape utilized for IC substrate and the like after sintering for solidification. The green sheet is adhered to a liner, such as a plastic tape, and has a core portion. The punch press machine is capable...http://www.google.com/patents/US4990080?utm_source=gb-gplus-sharePatent US4990080 - Punch press for piercing green sheet with liner
