PolarFab, a US-owned, pure-play analog and mixed-signal semiconductor foundry, has introduced an SiChrome (SiCr) thin film resistor that features low parasitics and a 500-Ohm sheet resistance to help reduce die size. The resistor is available on PolarFab's RFBC and ABC3 0.8-micron c-BiCMOS processes, used for manufacturing integrated circuits for high performance amplifier, line driver, consumer electronics, and power management applications.
The laser trimmable resistor makes the processes ideal for precision analog applications as well. The low parasitic SiCr thin film resistor provides the high resistances desired by designers in a smaller area than similar materials typically used in c-BiCMOS processes. The laser trimmability provides good resistor matching and contributes to a smaller die size and tighter tolerances for repeatable, consistent performance characteristics to reduce the tendency to over-design for process variation.
In addition to the reduced die size of circuits fabricated using PolarFab's RFBC and ABC3 processes, the SiCr resistor provides a zero temperature coefficient (TCR). Both the RFBC and ABC3 processes use 6" (150 mm) wafers.
PolarFab, Bloomington, MN 55425, USA.