Patent ID: 7005585
Filing Date: 2006-02-28
Classification: H01L,H05K

Abstract:
1. A mounting board comprising: a base substrate having a first principal surface; a wiring electrode formed on the first principal surface of the base substrate; and an insulation film which partially covers the first principal surface of the base substrate and the wiring electrode, the insulation film having a coated portion where the base substrate and the wiring electrode are coated with the insulation film, and an uncoated portion where the base substrate and the wiring electrode are not coated with the insulation film, wherein the coated portion of the insulation film includes a first coated portion and a second coated portion which extend substantially in parallel to each other with a predetermined spacing therebetween and which are substantially orthogonal to the wiring electrode, and the uncoated portion between the first and second coated portions is open substantially orthogonally to the wiring electrode; wherein L/T≧2 is satisfied, where L denotes the width of a portion of the base substrate exposed at the uncoated portion and T denotes the thickness of the insulation film.