US2017154748A1PendingUtilityA1

Low-current fuse stamping method

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Assignee: LITTELFUSE INCPriority: May 16, 2012Filed: Feb 9, 2017Published: Jun 1, 2017
Est. expiryMay 16, 2032(~5.8 yrs left)· nominal 20-yr term from priority
Inventors:James J. BeckertGregory StumpoStephen R. Shierry
H01H 85/143H01H 85/08Y10T29/302H01H 85/06H01H 85/0417H01H 85/50Y10T29/49107H01H 69/02H01H 85/055
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Claims

Abstract

A convenient, cost-effective method for manufacturing low-current fuse elements. The method may include the steps of stamping a substrate out of a sheet of material and stamping at least one hole in the substrate. The method may further include the steps of bonding a layer of fuse material to a surface of the substrate with a portion of the fuse material covering the hole, stamping a fuse element out of the portion of fuse material covering the hole, and separating an individual fuse from the fuse material and the substrate. A low-current fuse can thereby be obtained using an easily performed stamping process.

Claims

exact text as granted — not AI-modified
1 . A fuse comprising:
 a first fuse terminal formed from a first terminal layer covering a first edge of an electrically insulating substrate;   a second fuse terminal formed from a second terminal layer covering a second edge of the electrically insulating substrate; and   a conductive foil overlying and bonded to the first terminal and the second terminal and defining a fuse element therebetween.   
     
     
         2 . The fuse according to  claim 1 , wherein the conductive foil is formed from at least one of copper and zinc. 
     
     
         3 . The fuse according to  claim 1 , wherein the conductive foil has a thickness between 0.4 mm and 0.5 mm. 
     
     
         4 . The fuse according to  claim 1 , wherein the electrically insulating substrate is formed of FR4. 
     
     
         5 . The fuse according to  claim 1 , wherein the fuse element overlies a hole in the electrically insulating substrate. 
     
     
         6 . The fuse according to  claim 1 , wherein the electrically insulating substrate, the first and second fuse terminals, and the conductive foil are disposed in a stacked, flatly abutting arrangement. 
     
     
         7 . The fuse according to  claim 1 , wherein the electrically insulating substrate has a thickness of about 0.75 mm. 
     
     
         8 . The fuse according to  claim 1 , wherein the fuse element is S-shaped. 
     
     
         9 . The fuse according to  claim 1 , wherein the fuse element is Z-shaped.

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