Abstract: Growth-orientation of a crystal on a semiconductor device is achieved by using an oriented seed layer to grow a monocrystalline layer of silicon on an oxide. The oriented seed layer is provided by a regimented layer of silicon precipitates, which are deposited onto a surface of the oxide in a conventional aluminum-silicon deposition process. A film of silicon is deposited onto the oriented seed layer to grow a monocrystalline layer of silicon. The monocrystalline layer of silicon is further coated with an oxide, and a further seed layer is deposited. In this manner, a plurality of monocrystalline layers of silicon can be deposited on and between insulating layers of oxide. The method can be used for the manufacture of silicon-on-oxide transistors, having a low density of crystalline defects.

Abstract: An electrical contact (46) to a phosphorous doped polysilicon gate electrode (18) is formed by preventing arsenic, from a source and drain implant, from doping a portion (22) of the polysilicon gate electrode (18). A photoresist mask (20) covers a portion (22) of the polysilicon gate electrode (18) during the implant, thus preventing it from being doped. An electrical contact (46) is then formed to the masked portion (22) of the polysilicon gate electrode (18).

Abstract: A security system for alerting an intrusion disturbance at an entry point to a residence, or alerting as to other emergency conditions, such as fire is disclosed. In the system, a primary monitoring unit having intrusion detection sensors for placement at entry points to a residence produces an audible acoustic alarm signal upon the occurrence of an intrusion disturbance. The acoustic signal is detected by a secondary monitoring unit which in response transmits an electronic signal through the wiring in the residence. A central monitoring unit receives the transmitted electronic signal and activates an alerting alarm and automatic telephone dialer. The system may further include a portable alarm switch for transmitting a coded radio frequency signal to the central monitoring unit to provide remote activation of an alerting device.