Substrate Holding Fixture
Original Publication Date: 1981-Jul-01
Included in the Prior Art Database: 2005-Feb-11
An improvement has been made to the substrate-holding fixture that is described in the IBM Technical Disclosure Bulletin 22, 894-900 (August, 1979). The fixture holds either a ceramic substrate that carries a semiconductor chip or a semiconductor wafer of many chips. The fixture positions a chip at the focus of a laser beam so that the chip can be personalized by forming laser welds that interconnect metal lines on the chip and/or by deleting portions of these lines to isolate components.