Abstract: A method for encapsulation of an integrated circuit array that suppresses or eliminates absorption and subsequent out-gassing of water vapor and suppresses or eliminates out-gassing of toxic constituents of the encapsulation layer such as trimethyl borate. A first layer of borophosphosilicate glass is deposited on the integrated circuit array, followed immediately by deposit of a thin cap layer of undoped oxide of silicon. The method also allows use of boron and phosphorous concentrations in the borophosphosilicate glass as high as 9 weight percent with no loss of stability of that layer, before or after thermal treatment. Reflow processing temperatures as low as T.sub.r =700.degree.-900.degree. C. may be used here. Alternatively, silicon nitride can replace the silicon oxide in the cap layer, using either a high temperature process or a lower temperature plasma-enhanced process.

Abstract: A mechanically scanned antenna system having a multiport rotary switch for sector scanning is disclosed. The switch includes a stationary subassembly and a rotating subassembly. The stationary subassembly contains the input ports and the rotating subassembly contains the multiple output ports associated with each input port. Each of the multiple output ports of the switch is sequentially activated through its designed active sector to produce the desired antenna scan pattern. The stationary subassembly includes a barrier member which is rotatable to selectively orient and maintain orientation of the active region of the antenna system at any position through 360.degree..