self aligned electrode

The excellent frequency performance results from the novel structure of the U shaped emitter,together with self aligned emitter and LEU(lateral etched undercut) technologies.

采用自对准发射极、L EU等先进工艺技术实现了特征频率达到 1 0 8GHz,最大振荡频率达到 1 4 0 GHz的频率特性 。