Top Side Probe Head Fixture for Laser Trimmer Systems
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05
A top side probe head fixture for laser trimmer systems allows top side probing of pinless substrates without modifying existing laser system substrate parts handlers. Existing laser trimmer systems use bottom side probing to make contact to the substrate or module I/O pins. Standard equipment is an eight-position substrate parts handler. To convert the systems to top side probing, the standard substrate parts handler is removed and replaced with a two-position top side probing parts handler. Use of the two-position parts handler reduces the machine loading and unloading times and has a probe alignment problem. Since top side probing is needed to make contact to the new pinless generation of substrates, a new design probe head fixture is needed to utilize the throughput of the eight-position parts handler. The fixture (Fig.