CELLSTRUKTUR FOR EN INTEGRERAD HALVLEDARKRETSANORDNING AV INJEKTIONSLOGIKTYP OCH FORFARANDE FOR DESS TILLVERKNING

摘要

An integrated injection logic circuit cell structure and its fabrication are simplified. A pattern of oxide isolation regions is used to define, at least partially, the introduction of two types of impurities in such a way as to reduce the number of masking steps. Certain of these oxide regions do not penetrate through the conventional epitaxial layer, leaving a lateral buried path to serve as the base of a lateral injection transistor. A pattern of polycrystalline silicon containing impurities is used both as a diffusion source and an interconnection.