Arizona Game Birds David E. Brown

Laser Drilling Technique for Multilayer Ceramic Chip Component and Module.

“…Optical absorption efficiency () is an important factor in laser machining because, in thermal ablation machining, laser beam energy must be effectively absorbed by the ceramic green sheet to convert photon energy to thermal energy in the sheet. The optical reflectivi ty (1) of ceramics green sheets was measured from wavelengths of 200 to 2000nm using a spectrum photome ter (Hitachi, U-4000). Optical reflectivity and transmit tance of the PET film were measured to confirm YAG laser machinability.…”

“…Gas circulation is difficult to maintain, size is considerable, and running cost is hrgh. 1 Neodymium-doped yttrium aluminum garnet lasers (Nd: YAG), emitting a beam of near infrared energy with wavelength of 1.06m, are solid-state, meaning that, unlike large CO2 lasers, no gas circulation is required. An arc lamp as easily changed as a light bulb replaces the gas.…”