-
公开(公告)号:US5189201A
公开(公告)日:1993-02-23
申请号:US857496
申请日:1992-03-25
IPC分类号: C07C67/04
CPC分类号: C07C67/04
摘要: A lower fatty acid ester such as ethyl acetate or ethyl acrylate is prepared by a process in which a lower fatty acid such as acetic acid or acrylic acid is reacted with a lower olefin such as ethylene by using as solid catalyst a heteropoly-acid or its salt. The esterification is carried out in gaseous phase.
摘要翻译: 低级脂肪酸酯如乙酸乙酯或丙烯酸乙酯是通过使用低级脂肪酸如乙酸或丙烯酸与低级烯烃(如乙烯)作为固体催化剂使用杂多酸或其衍生物 盐。 酯化在气相中进行。
-
2.
公开(公告)号:US06627553B1
公开(公告)日:2003-09-30
申请号:US09656020
申请日:2000-09-05
IPC分类号: H01L21302
CPC分类号: H01L21/02063 , C11D3/042 , C11D3/2075 , C11D3/33 , C11D11/0047
摘要: A composition for removing side wall which includes an aqueous solution containing both nitric acid and at least one of carboxylic acids selected from the group consisting of polycarboxylic acid, aminocarboxylic acid, and salts thereof; a method of removing side wall; and a process for producing a semiconductor device. Use of the composition is effective in removing side wall at a low temperature in a short time in semiconductor device production without corroding the wiring material, e.g., an aluminium alloy. Thus, a semiconductor device having an aluminium alloy wiring which has undergone substantially no corrosion can be efficiently produced.
摘要翻译: 一种用于除去侧壁的组合物,其包括含有硝酸和选自多元羧酸,氨基羧酸及其盐中的至少一种羧酸的水溶液; 一种去除侧壁的方法; 以及半导体装置的制造方法。 组合物的使用在不腐蚀布线材料(例如铝合金)的情况下,在半导体器件生产中在短时间内在低温下除去侧壁是有效的。 因此,可以有效地制造具有基本上没有腐蚀的铝合金布线的半导体器件。
-