Patent · US Expired

Flux cleaning for flip chip technology using environmentally friendly solvents

US5988485A · kind A · utility

15Cited by
1References
5Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 17, 1998
Grant dateNov 23, 1999
Priority date
Expiry dateMar 17, 2018

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01L2924/09701
  • WIPO fieldSemiconductors
  • WIPO sectorElectrical engineering

Abstract

A method of assembling a substrate and die in a flip chip configuration uses a non-hazardous cleaning solvent to clean the flux residue. The non-hazardous cleaning solvent utilized is Ionox obtained from Kyzen Corporation. Optimized process parameters are: time 10-30 minutes, temperature 70-90.degree. C., pressure 40-70 psi, rotation speed and reversals 100-1000 rpm and 24-100 reversal cycles.

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