Abstract
An advanced analog/digital bipolar VLSI technology that combines on the same chip 2-ns 10K I <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> L gates with 1K analog devices is proposed. The new technology, called high-density integration technology-2 (HIT-2), is based on a new structure concept that consists of three major techniques: shallow grooved-isolation, I <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> L active layer etching, and I <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> L current gain increase. I <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> L circuits with 80-MHz maximum toggle frequency have developed compatibly with n-p-n transistors having a BV <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">CEO</inf> of more than 10 V and an f <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">T</inf> of 5 GHz, and lateral p-n-p transistors having an f <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">T</inf> of 150 MHz.
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