Technical Papers and Notes - Institute of Metals Division - Formation of A Ni-Ge Phase in Molten Lead
- Organization:
- The American Institute of Mining, Metallurgical, and Petroleum Engineers
- Pages:
- 3
- File Size:
- 646 KB
- Publication Date:
- Jan 1, 1959
Abstract
FABRICATION of semiconductor devices.requires the formation of electrical contacts, often involving the use of lead, tin, and lead-tin solders. In several recent instances when germanium had been bonded to nickel with lead, a new metallic phase appeared, unattached to either germanium or nickel, but rather suspended as a continuous foil wholly contained within the lead matrix. Since such metallic structures do not form in nickel-lead or lead-germanium systems under identical conditions, a brief study was made of the characteristics and possible formation mechanisms of this material. EXPERIMENTAL Specimens were prepared by placing single crystal, transistor-grade germanium discs, 30-mils in diam by 6-mils thick, into a depression in a graphite boat. =A* nickel washers, 125 mils in diam by 5-mils thick, containing a center hole of 10-mils diam, and coined into a soup bowl shape, were loaded on top of the discs, so that the bottom of the
Citation
APA: (1959) Technical Papers and Notes - Institute of Metals Division - Formation of A Ni-Ge Phase in Molten Lead
MLA: Technical Papers and Notes - Institute of Metals Division - Formation of A Ni-Ge Phase in Molten Lead. The American Institute of Mining, Metallurgical, and Petroleum Engineers, 1959.