Analysis of glass and metal packaging
Glass and metal package with graphite sintered plate. Drawing a single crystal with a graphite heater. Ion implantation and plasma etching with graphite components and Shi Momo by drawing the fiber; - EDM with graphite electrode; - mechanical carbon graphite (such as mechanical seal with graphite ring. Vacuum pump and compressor blade with graphite and graphite bearing rotary vane etc.); - Electrical carbon graphite (such as carbon and conductive contact materials); - graphite crystallizer for continuous casting; graphite products by powder metallurgy and hard alloy and electric furnace; melting metal (alloy) by graphite crucible; - other carbon graphite processing. Some people say that the glass metal package is a component of the trunk and limbs, some people say that the shell and chip is the relationship between the lips and teeth, skin and meat. In short, the consensus is that the shell is not only the package of the coat of the chip, it has a support (electrical connection, heat transfer, mechanical protection, etc.), but also components of the component. The quality of the shell is closely related to the quality and reliability of the components. As everyone knows, air tightness is the shell is one of the important indicators of the components, the cavity air tightness is not good to the outside water vapor, harmful ions or gas into the components of the resulting surface leakage, "knot" changes, as well as the failure mode parameters (according to reports, due to moisture content in the cavity due to component failure rate for more than 26% of the total failure rate). In the 1014A GJB548A sealing method, air tightness of the shell does not cover provisions for A4 test conditions, the failure criterion: unless otherwise specified, if the measurement of the leakage rate of more than 1 "Rl * 10-3 Pa? Cm3/s (helium), device (shell) should be regarded as a failure.
