摘要:
A dry etching gas comprising a C 4-6 fluorine compound which has an ether bond or carbonyl group and one or more fluorine atoms in the molecule and is constituted only of carbon, fluorine, and oxygen atoms and in which the ratio of the number of fluorine atoms to the number of carbon atoms (F/C) is 1.9 or lower (provided that the compound is neither a fluorine compound having one cyclic ether bond and one carbon-carbon double bond nor a saturated fluorine compound having one carbonyl group); a mixed dry etching gas comprising the dry etching gas and at least one gas selected from the group consisting of rare gases, O 2 , O 3 , CO, CO 2 , CHF 3 , CH 2 F 2 , CF 4 , C 2 F 6 , and C 3 F 8 ; and a method of dry etching which comprises converting either of these dry etching gases into a plasma and processing a semiconductor material with the plasma. The dry etching gases can be safely used, are reduced in influence on the global environment, and can highly selectively dry-etch a semiconductor material at a high dry etching rate to form a satisfactory pattern shape. The dry etching method employs either of these dry etching gases.
摘要:
A gas for plasma reaction comprising a chainlike perfluoroalkyne having 5 or 6 carbon atoms, preferably perfluoro-2-pentyne. This plasma reaction gas is suitable for dry etching for formation of a fine pattern, for plasma CVD for formation of a thin film, and for plasma ashing. The plasma reaction gas is synthesized by contacting a dihydrofluoroalkane compound or a monohydrofluoroalkene compound with a basic compound.
摘要:
A semiconductor device having an insulating film comprising a fluorine-doped carbon film having experienced a thermal history under a temperature of 420°C or less, characterized in that the fluorine-doped carbon film has a hydrogen atom content of 3 atomic % or less before the experience of the thermal history.
摘要:
The present invention relates to a semiconductor device comprising an insulation film consisting of a fluoridation carbon film that has been subjected to thermal history of 420 °C or lower. The feature of the present invention is that an amount of hydrogen atoms included in the fluoridation carbon film is 3 atomic % or less before the fluoridation carbon film is subjected to the thermal history.
摘要:
A gas for plasma reaction comprising a chainlike perfluoroalkyne having 5 or 6 carbon atoms, preferably perfluoro-2-pentyne. This plasma reaction gas is suitable for dry etching for formation of a fine pattern, for plasma CVD for formation of a thin film, and for plasma ashing. The plasma reaction gas is synthesized by contacting a dihydrofluoroalkane compound or a monohydrofluoroalkene compound with a basic compound.