Other

Littelfuse, Inc.

Steven J Whitney

Scott Allen Davidson

Edwin James Harris

David Perry

Nate Maercklein

Rob Deblieck

The present invention provides overvoltage circuit protection. Specifically, the present invention provides a voltage variable material ('VVM') that includes an insulative binder that is formulated to intrinsically adhere to conductive and nonconductive surfaces. The binder and thus the VVM is self-curable and may be applied to an application in the form of an ink, which dries in a final form for use. The binder eliminates the need to place the VVM in a separate device or for separate printed circuit board pads on which to electrically connect the VVM. The binder and thus the VVM can be directly applied to many different types of substrates, such as a rigid (FR-4) laminate, a polyimide or a polymer. The VVM can also be directly applied to different types of substrates that are placed inside a device.

Voltage variable material for direct application and devices employing same

An electrical circuit protection device has an overcurrent protection portion and an overvoltage protection portion. The overcurrent protection portion has a surface. The overvoltage protection portion is disposed on the surface. In one preferred embodiment, the overcurrent portion includes a PTC device and the overvoltage portion includes a voltage variable material. A number of terminations are configured to connect the overcurrent protection portion and the overvoltage protection portion to a printed circuit board.

Integrated electrostatic discharge and overcurrent device

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Lake Zurich, IL, United States of America

Steven J Whitney