English: KT315 (npn) and KT361 (pnp) transistors were the first planar epitaxial transistors manufactured in Soviet Union. Manufacturing started at the end of 60's. Dicing defects and extra space around the transistor are visible. The crystal body is the collector, the center is the base and around it is the emitter ring. The base goes under the emitter ring and continues on the other side of the emitter ring.