Quality Semiconductor Inc, Santa Clara, California maker of logic and memory products, has filed to go public with an initial offer of 1.8m shares, all of them new, at a target price of between $8.50 and $9.50. The company, whose logic products include the QSFCT family of high-speed, low-noise interface logic devices that interconnect various elements in a microprocessor-based system, and QuickSwitch family of high-speed, low-resistance bus switches, and First-In, First-Out and static RAM devices, using its QCMOS process, did not give plans for the cash.Underwriting for the offering will be managed by Robertson, Stephens & Co LP and Needham & Co Inc.