申请人:KABUSHIKI KAISHA TOSHIBA
公开号:EP0787537A1
公开(公告)日:1997-08-06
A cleaning agent which can substitute for chlorofluorocarbon or chlorinated solvents, a method of cleaning therewith, and equipment therefor. In particular, a method of cleaning electronics parts such as printed boards or mounted parts or metallic parts which makes it possible to remove various contaminants from the parts and dry the same to the extent comparative to that of the method of cleaning with chlorofluorocarbon or chlorinated solvents, and a cleaning agent and equipment therefor. Examples of the cleaning agent include polar cleaning agents with a solubility parameter of 9 or above or a permittivity of 4 or above, mixtures thereof with other cleaning agents with a solubility parameter of less that 9 and a permittivity of less than 4, and cleaning agents containing as the active ingredient an azeotropic or pseudoazeotropic composition containing a low-molecular-weight siloxane compound. The cleaning method is characterized by comprising at least one step selected from the group consisting of the step of cleaning the object with a polar cleaning agent having a solubility parameter of 9 or above or a permittivity of 4 or above, the step of rinsing the object with a mixture of the above polar cleaning agent with another cleaning agent having a solubility parameter of less than 9 and a permittivity of less than 4, and the drying step.
一种可替代氟氯化碳或氯化溶剂的清洗剂、一种用其进行清洗的方法及其设备。特别是一种清洗电子部件(如印刷电路板或安装部件或金属部件)的方法,该方法可以清除部件上的各种污染物,并使其干燥到与使用氯氟碳化合物或氯化溶剂清洗方法相当的程度,以及一种清洗剂和设备。清洗剂的例子包括溶解度参数为 9 或以上或介电常数为 4 或以上的极性清洗剂,其与其他溶解度参数小于 9 和介电常数小于 4 的清洗剂的混合物,以及作为活性成分含有低分子量硅氧烷化合物的共沸或假共沸组合物的清洗剂。该清洗方法的特点是至少包括一个步骤,该步骤选自以下组别:用溶解度参数为 9 或以上或介电常数为 4 或以上的极性清洗剂清洗物体的步骤;用上述极性清洗剂与另一种溶解度参数小于 9 和介电常数小于 4 的清洗剂的混合物冲洗物体的步骤;以及干燥步骤。