Patent · US Expired

Lead-frame forming material

US5641577A · kind A · utility

3Cited by
4References
1Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 14, 1995
Grant dateJun 24, 1997
Priority date
Expiry dateMar 14, 2015

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10T428/31699
  • WIPO fieldAudio-visual technology
  • WIPO sectorElectrical engineering

Abstract

Disclosed are i) a lead-frame forming material which contains a light-sensitive material comprising (1) a diazo salt light-sensitive resin and (2) a water-insoluble but alkaline water-soluble lipophilic high molecular weight compound, ii) a lead-frame forming material which contains a light-sensitive material comprising a photodimeric light-sensitive composition, and iii) a lead-frame forming material which contains a light-sensitive material comprising (1) a water-insoluble but alkaline water-soluble resin, (2) a compound capable of generating an acid by irradiation with active rays or radiant rays, and (3) a compound containing at least one crosslinkable group by the action of the acid.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.