Cirtek Holdings Philippines Corporation, through its subsidiaries, operates as an independent subcontractor for semiconductor assembly, test, and packaging services in Asia, Europe, and the United States. It primarily offers turnkey solutions, such as package design and development; wafer probing; wafer back grinding; assembly and packaging; final testing of semiconductor devices; and delivery and shipment to its end user customers. The company also provides protection products to protect electronic devices from damaging voltage or current spikes; light sensors that are optical devices, which sense the intensity of light and trigger the automatic switching on and off of headlights, and the automatic adjustment of air conditioning settings in cars; and real time clocks that are precision time keeping devices. In addition, it offers voltage control oscillators, which are designed to be controlled in oscillation frequency by a DC voltage input; electronic relays that are opto relays used in controlling voltage and power equipment; and power management devices, which are used in a range of power management applications, including telecommunications, industrial equipment, portable devices, computers, and networks. Further, the company provides microwave and wireless solutions that are used in service provider, education, enterprise, government/municipalities, and healthcare applications, as well as carrier and private data networks catering mobile backhaul. Additionally, it offers antenna solutions for wireless cellular networks; and box build turnkey manufacturing solutions to radio frequency, microwave, and millimeter wave products used in the wireless industry, such as telecommunication, satellite, aerospace and defense, and automotive wireless devices. The company was founded in 1984 and is headquartered in Binan City, the Philippines. Cirtek Holdings Philippines Corporation operates as a subsidiary of PCD Nominee Corporation.