公开(公告)号：US06670557B2

公开(公告)日：2003-12-30

申请号：US10001668

申请日：2001-10-23

Applicant: Martin Gehrke ,  Torsten Pechstein

Inventor： Martin Gehrke ,  Torsten Pechstein

IPC: H05K116

CPC classification number: G01D3/08 ,  G01D11/245 ,  G01N27/28 ,  H05K1/02 ,  H05K1/181 ,  H05K3/284 ,  H05K2201/09036 ,  H05K2201/09145 ,  H05K2201/09972 ,  H05K2201/09981 ,  H05K2201/10151 ,  H05K2203/1173

Abstract: A design for constructing an input circuit to receive and process an electrical signal, such as a voltage signal from a voltage source, where the input circuit has an extremely high resistance of at least 1011 ohms and is located on a printed circuit board. A first area of the printed circuit board carrying components of the input circuit is separated from a second area surrounding or contiguous to it by a channel-shaped recess to preserve the high resistance of the circuit even under operating conditions and at high relative humidity. The circuit is configured in such a way that the channel-shaped recess terminates in the interior of the printed circuit board and is extended in the direction of the thickness of the printed circuit board immediately up to a moisture-impermeable barrier layer which underlies the first area of the printed circuit board. The channel-shaped recess and the first area are filled and surrounded by a cohesive moisture-impermeable material.

Abstract translation: 一种用于构造输入电路以接收和处理诸如来自电压源的电压信号的输入电路的设计，其中输入电路具有至少10 11欧姆的极高电阻并位于印刷电路板上 。 承载输入电路部件的印刷电路板的第一区域与通道形凹槽周围或与其相邻的第二区域分开，即使在操作条件和高相对湿度下也能保持电路的高电阻。 该电路被配置成使得通道形状的凹陷终止于印刷电路板的内部，并且在印刷电路板的厚度方向上立刻延伸到不透水的阻挡层，该阻挡层位于第一 印刷电路板的面积。 通道形凹部和第一区域被凝聚的不透水材料填充并包围。