In semiconductor packages, warpage is measured by the warp factor . The escape of gas is prevented by means of a stem that rotates or moves within its seal material during actuation. The dynamic seal interface separates the medium from the atmosphere. Each packet contains data and control information. Also see message protocol .
PAL see programmable array logic .
There may be up to three panels per sign, key word, message, and symbol panels. Examples are dusts, fumes, smokes, mists, and fogs. Also see protrusion . The final deposition layer in processing. This activity is used to evaluate normal production mode.