<p>A resist opening part (5a), which is positioned around a through hole (2) formed in a board (1) and which is not covered by a resist (4), is so shaped that the length of the flow mounting in the flow direction is long to make the surface tension acting on a solder (6) during the soldering small.</p>
申请公布号
WO2008050511(A1)
申请公布日期
2008.05.02
申请号
WO2007JP64193
申请日期
2007.07.18
申请人
MITSUBISHI ELECTRIC CORPORATION;KOMURA, SHINGO;AKEYAMA, KATSUSHIGE;YOKOYAMA, MOTOO
