| 摘要 |
PURPOSE:To stabilize dimension variation by providing an aging process for the heat treatment to remove completely a solvent only and a maturing process to stabilize the formation under the normal temperature, normal pressure and normal humidity prior to the positioning and drilling process. CONSTITUTION:Acrylic resin or the like as a binder and dibutyl phthalate or the like as a plasticizer are mixed and turned into a slurry by means of a solvent, which is bonded on a polyester film 2 in a given thickness to manufacture a green sheet 1. The green sheet 1 from which the film 2 is peeled off is put into, for example, a constant temperature bath of 70 deg.C and aging is carried out for 30 minutes to eliminate the solvent completely. In that case, as the elimination temperature other than the solvent such as the elimination temperature of the binder is around 350 deg.C-400 deg.C and that of the plasticizer is around 150 deg.C, these are not at all eliminated by the heat treatment of 70 deg.C for 30 minutes. Then, the same is left in the state of normal temperature, pressure and humidity and put in the maturing process. As a result, dimension variation rate is completely eliminated in around 1-2 weeks, and the accuracy of positioning and processing in the processing process can be enhanced substantially. |
