Abstract: A bipolar transistor with raised extrinsic base and selectable self-alignment between the extrinsic base and the emitter is disclosed. The fabrication method may include the formation of a predefined thickness of a first extrinsic base layer of polysilicon or silicon on an intrinsic base. A dielectric landing pad is then formed by lithography on the first extrinsic base layer. Next, a second extrinsic base layer of polysilicon or silicon is formed on top of the dielectric landing pad to finalize the raised extrinsic base total thickness. An emitter opening is formed using lithography and RIE, where the second extrinsic base layer is etched stopping on the dielectric landing pad. The degree of self-alignment between the emitter and the raised extrinsic base is achieved by selecting the first extrinsic base layer thickness, the dielectric landing pad width, and the spacer width.

Abstract: A zero to 100% continuously adjustable, low deadband, point contact pneumatic level switch is used in conjunction with an electronic controller, a pneumatic-to-current converter and a current-to-pneumatic converter to control brine level in a gravity-fed batch process. The apparatus includes a flapper disc assembly that is free to rotate or spin in place as the mechanism tracks the level of the fluid and a nozzle to seal, expel and transmit a pneumatic signal for measurement or control of fluid level. The flapper disk/nozzle assembly does not come in contact with the controlled fluid.

Abstract: The way i look at my invention of an external jack for the seeing impared is simple. The gaming machines all ready have sound in one form or another, wether it is a bell for a jack pot or it is a newer machine with actual words coming out of speakers mounted on the machine. What i am suggesting is the engineers that design the games add verbal sounds to tell the seeing impared what is happening through the aid of an external jack on the machine in which they (the customer) would plug in the headset. In short it allows the seeing impared the enjoyment of playing any machine instead of being limited to just slot machine.