| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an insulation film composition which is capable of forming an insulation film having a further superior withstand voltage characteristic. <P>SOLUTION: Thick film insulation paste having glass as its principal element includes alumina powder with its aspect ratio of 1.2 or less, produced using CVD; therefore, voltage which an insulation film, obtained from the thick film insulation paste, can withstand can be increased. Especially, when the alumina powder has an aspect ratio of 1.1 or less and is significantly spherical, a denser insulation film can be obtained as the result of burning, since protrusions come to be rarely caused to the insulation film and high dispersibility is obtained when preparing the thick film insulation paste, so that the density of the film is increased at the time of printing and desiccation. <P>COPYRIGHT: (C)2012,JPO&INPIT |
