Dynamic random access memory

A dynamic random access memory (DRAM) formed in a silicon chip that includes a support area in which support circuitry of the memory includes a single electrical contact through two dielectric layers to a conductive layer of a gate stack of a field effect support transistor that has a capping layer...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SCHNABEL, RAINER FLORIAN, GRUENING, ULRIKE
Format: Patent
Sprache:eng ; fre ; ger
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Beschreibung
Zusammenfassung:A dynamic random access memory (DRAM) formed in a silicon chip that includes a support area in which support circuitry of the memory includes a single electrical contact through two dielectric layers to a conductive layer of a gate stack of a field effect support transistor that has a capping layer through which the electrical contact passes to the gate. The DRAM also includes a memory area containing an array of memory cells each include a field effect transistor. Drain regions of the transistors of the memory cells and drain and source regions of field effect transistors of the support transistors have first electrical contacts thereto through the first dielectric layer and have second electrical contacts which pass through the second dielectric layer and electrical contact to the first electrical contacts. Forming of the second electrical contacts concurrently with the single electrical contact to the gate of the support transistor saves a processing step over prior art processes.