| 摘要 |
<p>PROBLEM TO BE SOLVED: To permit the execution of withstand voltage test surely without using any cutting machine or the like even when the size of a metal foil clad laminate is thin or large. SOLUTION: A laminate 8 is formed by superposing metal foils (copper foils 7, 7) on both sides of at least one sheet or more of prepreg 6 and, thereafter, heating and pressurizing. In this case, the size of the metal foils (copper foils 7, 7) is determined so as to be larger than that of the prepreg 6 in both of longitudinal size and lateral size while cut-off members (polyimide tapes 9) are buried near four sides of the prepreg 6.</p> |
