Surface-mountable device having a voltage variable polgmeric material for protection against electrostatic damage to electronic components
DCFirst Claim
1. A surface-mounted circuit protection device comprising:
- a substrate having an upper surface;
a pair of electrodes deposited on the upper surface of the substrate separated by a gap having a gap width, wherein the gap width, at least, partially determines a voltage rating for the circuit protection device, the electrodes having one or more notches therein for preventing narrowing of the gap width; and
,a voltage variable polymeric material deposited between the electrodes in the gap of the upper surface of the substrate for protection against electrostatic transient voltage damage to electrical components.
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Abstract
The thin film, circuit device is an subminiature overvoltage protection device in a surface mountable configuration for use in printed circuit board or thick film hybrid circuit technology. The surface mountable device (SMD) is designed to protect against electrostatic discharge (ESD) damage to electronic components.
The circuit protection device includes three material subassemblies. The first subassembly generally includes a substrate carier, electrodes, and terminal pads for connecting the protection device 60 to a PC board. The second subassembly includes a voltage variable polymer material with non-linear characteristics, and the third subassembly includes a cover coat for protecting other elements of the circuit protection device.
117 Citations
7 Claims
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1. A surface-mounted circuit protection device comprising:
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a substrate having an upper surface; a pair of electrodes deposited on the upper surface of the substrate separated by a gap having a gap width, wherein the gap width, at least, partially determines a voltage rating for the circuit protection device, the electrodes having one or more notches therein for preventing narrowing of the gap width; and
,a voltage variable polymeric material deposited between the electrodes in the gap of the upper surface of the substrate for protection against electrostatic transient voltage damage to electrical components. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification