摘要:
FET devices (10) are manufactured using STI on a semiconductor substrate (11) coated with a pad (14) from which are formed raised active silicon device areas and dummy active silicon mesas (12) capped with pad structures on the doped silicon substrate and pad structure. A conformal blanket silicon oxide (22) layer is deposited on the device (10) with conformal projections above the mesas (12). Then a polysilicon film (24) on the blanket silicon oxide layer (22) is deposited with conformal projections above the mesas (12). The polysilicon film projections are removed in a CMP polishing step which continues until the silicon oxide layer (22) is exposed over the pad structures (14). Selective RIE partial etching of the conformal silicon oxide layer (22) over the mesas (12) is next, followed in turn by CMP planarization of the conformal blanket silicon oxide layer (22) which converts the silicon oxide layer into a planar silicon oxide layer, using the pad silicon nitride (14) as an etch stop.
摘要:
A method of isolation in silicon integrated circuit processing overfills the trench by a fill margin, deposits a temporary layer of poly (120) having a thickness less than the trench depth by the thickness of an oxide polish stop (130), so that the top of the polish stop is coplanar with the top of the fill layer outside the trench; the temporary layer is polished outside the trench, using the fill layer and the polish stop layer (130) as polish stops; the polish stop layer is removed together with the same thickness of the fill layer and temporary layer, preserving planarity that is destroyed by selectively etching the fill layer; the remaining temporary layer is stripped and a final touch up polish of the fill layer stops on the pad nitride.
摘要:
FET devices (10) are manufactured using STI on a semiconductor substrate (11) coated with a pad (14) from which are formed raised active silicon device areas and dummy active silicon mesas (12) capped with pad structures on the doped silicon substrate and pad structure. A conformal blanket silicon oxide (22) layer is deposited on the device (10) with conformal projections above the mesas (12). Then a polysilicon film (24) on the blanket silicon oxide layer (22) is deposited with conformal projections above the mesas (12). The polysilicon film projections are removed in a CMP polishing step which continues until the silicon oxide layer (22) is exposed over the pad structures (14). Selective RIE partial etching of the conformal silicon oxide layer (22) over the mesas (12) is next, followed in turn by CMP planarization of the conformal blanket silicon oxide layer (22) which converts the silicon oxide layer into a planar silicon oxide layer, using the pad silicon nitride (14) as an etch stop.
摘要:
A method of isolation in silicon integrated circuit processing overfills the trench by a fill margin, deposits a temporary layer of poly (120) having a thickness less than the trench depth by the thickness of an oxide polish stop (130), so that the top of the polish stop is coplanar with the top of the fill layer outside the trench; the temporary layer is polished outside the trench, using the fill layer and the polish stop layer (130) as polish stops; the polish stop layer is removed together with the same thickness of the fill layer and temporary layer, preserving planarity that is destroyed by selectively etching the fill layer; the remaining temporary layer is stripped and a final touch up polish of the fill layer stops on the pad nitride.
摘要:
Die Erfindung betrifft die Herstellung von mit Strukturen versehenen Lackschichten für die Mikrogalvanoplastik mittels Röntgenstrahlen. Dabei wird die Lackschicht (3) unter Zwischenschaltung einer dünnen Metallschicht (2) auf eine Unterlage (1) aus einem Material mit dem gleichen oder ähnlichen Ausdehnungskoeffizienten wie die Lackschicht (3) gebracht (Figur). Die Erfindung dient der Herstellung von 100 µm dicken Polymethylmetacrylat-(PMMA)-Schichten mit 10 µm breiten Strukturen wie sie insbesondere für die Fertigung von Trenndüsen für Isotopenanreicherungsanlagen verwendet werden.
摘要:
Ziel der Erfindung ist es, ein Fertigungsverfahren zu entwickeln, das es ermöglicht, einfacher als bisher Röntgenmasken mit einer Trägerplatte aus Metall zu erzeugen. Dazu wird eine Trägerplatte aus Kupfer, die den späteren Rahmen ergibt, mit einer Nickelschicht überzogen, auf der zum Beispiel eine Titanschicht aufgebracht wird. Nach dem Aufkleben einer PMMA-Folie auf der Titanschicht erfolgt die Strukturierung der PMMA-Schicht mit Hilfe der Röntgenlithografie und anschließend das Galvanisieren im Goldbad. Abschließend wird von der Rückseite der Trägerplatte durch zwei Ätzprozesse die Titanfolie freigelegt.