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US 2003/0227368 A1Published application
Surface mountable laminated thermistor device
AssigneeProtectronics Technology Corporation
InventorsChien-Shan Huang, Ren-Haur Hwang, Chih-Yi Chang
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Abstract
The present invention discloses a surface mountable laminated thermistor device which utilizes current-used double sided metal foil clad substrate as a base material and a PTC conductive composite that complies with circuit connection design combinations among electrodes to obtain a surface mountable laminated thermistor device with a parallel manner, and vastly simplify the fabrication process of the surface mountable laminated thermistor device.
Claims19
A surface mountable laminated thermistor device consisting of:
- A first electrode layer comprising a first portion and a second portion and being electrically insulated between therein;
- an electrically insulating layer disposed under said first electrode layer;
- a first conductive layer disposed under said electrically insulating layer and said first conductive layer, comprising a first conductive part and a second conductive part and being electrically insulated between therein;
- a first conductive mechanism being interposed between said first conductive part of said first conductive layer and said second portion of said first electrode to allow said first conductive part of said first conductive layer to extend through said electrically insulating layer and conductive with said second portion of said first electrode;
- a second conductive mechanism interposed between said second conductive part of said first conductive layer and said first portion of said first electrode to allow said second conductive part of said first conductive layer to extend through said electrically insulating layer and being conductive with said first portion of said first electrode;
- a PTC conductive composite disposed under said first conductive layer;
- a second electrode layer comprising a first portion and a second portion and being electrically insulated between therein;
- the distance between said first portion of said second electrode and said second portion of said second electrode being greater than the thickness of said PTC conductive composite;
- and the minimum distance between said first portion of said second electrode and said first conductive part of said first conductive layer and the minimum distance between said second portion of said second electrode and said second conductive part of said first conductive layer are both less than the distance between said first portion of said second electrode and said second portion of said second electrode;
- a third conductive mechanism extending through said PTC conductive composite and said electrically insulating layer to allow said first portion of said second electrode layer to be conductive with said first portion of said first electrode layer;
- and
- a fourth conductive mechanism extending through said PTC conductive composite and said electrically insulating layer to allow said second portion of said second electrode layer to be conductive with said second portion of said first electrode layer.
9 more elements
A circuit protection device comprising:
- a first electrode layer;
- a first electrically insulating layer;
- a first conductive layer;
- a PTC conductive composite;
- a second electrode layer;
- and
- a first conductive mechanism, a second conductive mechanism, a third conductive mechanism, and a fourth conductive mechanism;
- said circuit protection device from top to bottom consists of said first electrode layer, said first electrically insulating layer, said first conductive layer, said PTC conductive composite, and said second electrode layer;
- an upper trench being disposed on said first electrode layer such that said first electrode layer is divided into a first portion and a second portion being electrically insulated between therein;
- a middle trench disposed on said first conductive layer such that said first conductive layer is divided into an electrically insulating first conductive part and second conductive part;
- a lower trench disposed on said second electrode layer such that said second electrode layer is divided into an electrically insulating first portion and second portion;
- the minimum width of said lower trench being greater than the thickness of a PTC conductive composite;
- said first conductive mechanism interposed between said first conductive part of said first conductive layer and said second portion of said first electrode such that said first conductive part of said first conductive layer is able to extend through said first electrically insulating layer and be electrically connected to said second portion of said first electrode;
- said second conductive mechanism interposed between said second conductive part of said first conductive layer and said first portion of said first electrode such that said second conductive part of said first conductive layer is able to extend through said first electrically insulating layer to be electrically connected to said first portion of said first electrode;
- said third conductive mechanism extending through a PTC conductive composite and said electrically insulating layer such that said first portion of said second electrode layer is able to be electrically connected to said first portion of said first electrode layer, but said third conductive mechanism not being physically contacting said first conductive part of said first conductive layer;
- and
- said fourth conductive mechanism extending through a PTC conductive composite and said electrically insulating layer such that said second portion of said second electrode layer is able to be electrically connected to said second portion of said first electrode layer, but said fourth conductive mechanism not being physically contacting said second conductive part of said first conductive layer.
14 more elements
Dependencies are inferred from the claim text.