US2007045838A1PendingUtilityA1

Lead-containing anodes

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Assignee: WEISER MARTIN WPriority: Oct 8, 2002Filed: Nov 2, 2006Published: Mar 1, 2007
Est. expiryOct 8, 2022(expired)· nominal 20-yr term from priority
Inventors:Martin WeiserNancy DeanBrett M. ClarkMichael J. BossioRonald H. FlemingJames Flint
B23K 35/268C22B 13/06B23K 35/26C25C 1/18B23K 35/025H10W 72/90H10W 72/9415H10W 90/724H10W 72/252H10W 72/251H10W 90/701H10W 74/117H10W 72/20H05K 3/346H05K 3/3485
46
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Claims

Abstract

The invention includes solder materials having low concentrations of alpha particle emitters, and includes methods of purification of materials to reduce a concentration of alpha particle emitters within the materials. The invention includes methods of reducing alpha particle flux in various lead-containing and lead-free materials through purification of the materials. The invention also includes methods of estimating the fractionation of a low concentration of one or more alpha particle emitters during purification of a material.

Claims

exact text as granted — not AI-modified
1 - 9 . (canceled)  
   
   
       10 . A lead-containing anode having an alpha flux of less than 0.001 cts/cm 2 /hr, the lead-containing anode comprising at least about 50 weight % lead.  
   
   
       11 . The lead-containing anode of  claim 10  having an alpha flux of less than 0.0005 cts/cm 2 /hr.  
   
   
       12 . The lead-containing anode of  claim 10  having an alpha flux of less than 0.0002 cts/cm 2 /hr.  
   
   
       13 . The lead-containing anode of  claim 10  having an alpha flux of less than 0.0001 cts/cm 2 /hr.  
   
   
       14 - 29 . (canceled)

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