Old article (2011), always nice to know:

Apple taps trio of suppliers to provide GaAs silicon alternative for iPhone 5

Avago, TriQuint and Skyworks have all been tapped to supply gallium arsenide, or GaAs, components that will be found in Apple's next iPhone, industry sources reportedly toldDigiTimes. The total material costs of GaAs components per iPhone is estimated to reach about $6.

POET Technologies Announces the Appointment of Two New Directors

Todd A. DeBonis is a veteran semiconductor executive with over 27 years of expertise in sales, marketing and corporate development. For the last decade, Mr. DeBonis was the Vice President of Global Sales and Strategic Development at TriQuint Semiconductor. During his tenure TriQuint experienced dramatic growth and recognition in the industry as the technology leader in RF solutions. Mr. DeBonis played an integral part in the recent merger with RFMD and subsequent creation of Qorvo, Inc.