Solar cell assembly defluxing using ozone depleting chemical replacements
Mcintyre, LJ; Lempka, R; Main, D
| HERO ID | 1629580 |
|---|---|
| Year | 1997 |
| Title | Solar cell assembly defluxing using ozone depleting chemical replacements |
| Book Title | NASA CONFERENCE PUBLICATION |
| Authors | Mcintyre, LJ; Lempka, R; Main, D |
| Editor | Whitaker, AF; ClarkIngram, M; Hessler, SL; |
| Publisher Text | NASA |
| City | WASHINGTON |
| Volume | 3349 |
| Page Numbers | 117-126 |
| Abstract | Studies to identify trichlorotrifluoroethane (Freon TF used at TRW in alcohol & stabilizer mixture formulations such as Freon TES and Genesolv DES) replacement cleaning agents for solar cell defluxing applications have been ongoing at TRW since 1992. Though initial studies identified some promising aqueous and semi-aqueous cleaning agents, they were eliminated as replacement candidates in 1994 due to process control, substrate corrosion, and manufacturing floor space concerns. All scale-up testing since 1994 has concentrated on warm (60 degrees C) isopropyl alcohol (IPA), hydrochlorofluorocarbon (HCFC) (AK- 225), and hydrofluorocarbon (HFC) (Vertrel SMT, an azeotrope of Vertrel XF HFC and dichloroethylene) technologies as replacement candidates for solar array manufacturing applications. Based on the results of the scale-up test efforts, the SMT and pure AK-225 materials cleaned as well as the existing process, but both materials attacked the substrate's silicone solar cell-to-coverglass bond region more aggressively than the existing Freon TF based cleaning agents. The AK-225AES (an azeotrope of AK-225, ethanol and stabilizer) material was identified as a drop in replacement for the existing process, however this HCFC will only see limited implementation because of its production cut-off date in the year 2015, high cost, and increased health risk (50 ppm Threshold Limit Value) compared to the Freon TF (1000 ppm Threshold Limit Value). |
| Wosid | WOS:A1997BJ47U00016 |
| Is Certified Translation | No |
| Dupe Override | No |
| Conference Location | HUNTSVILLE, AL |
| Isbn | ************* |
| Conference Name | 2nd Aerospace Environmental Technology Conference |
| Comments | Source: Web of Science WOS:A1997BJ47U00016 Journal:SECOND AEROSPACE ENVIRONMENTAL TECHNOLOGY CONFERENCE |
| Is Public | Yes |