Printed wiring board

Details Printed wiring board Printed wiring board

2005-10-20

2008-11-18

Lam, Cathy (Department: 1794)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C361S761000, C361S766000, C174S260000, C174S261000

Reexamination Certificate

active

07453702

ABSTRACT:
A printed wiring board comprises the insulating layer11(12); at least one resistance element311(312) comprising a metal as a main component has 0.5 to 5 μm of a roughened surface in an arithmetic means height in the one surface, in −Z direction, and 5% to 50% of the arithmetic mean height in average thickness, which is embedded close to a surface on one side of the insulating layer11and a conductive pattern wired surface is composed of the one surface of the resistance element and the one side of the insulating layer11; and the conductive pattern351(352), arranged on the conductive pattern wired surface, is connected to the terminal of the resistance element311(312). With this structure, it is provided the printed wiring board comprising the resistance element having an accurate and stable resistance value in a broader resistance value range.

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DuPont, DuPont Electronic Materials, Printed Board Built-In Elements, Feb. 15, 2002, disclosed at the internet address of http://www.dupont.co.jp/mcm/apri/print/ER.html.

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