Accession Number : ADA017737

Title :   Basic Adhesion Mechanisms in Thick and Thin Films.

Descriptive Note : Quarterly technical rept. no. 2, 1 Apr-30 Jun 75,

Corporate Author : RCA LABS PRINCETON N J

Personal Author(s) : Hitch,Thomas T. ; Bube,Kenneth R.

Report Date : 31 JUL 1975

Pagination or Media Count : 55

Abstract : In this quarter, continued experiments were conducted to separate and quantify the chemical from the micromechanical contributions to the adhesion strength. It was shown that silver has a higher chemical adhesion than gold to a glass of composition similar to that of frits used in commercial thick-film conductors. Isothermal sintering studies of gold, silver, and copper powders in the presence and absence of the liquid glass phase showed that densification rates and microstructure differed markedly in each metal powder. Large densification rate differences were also noted in gold powders with different morphologies and particle size distributions. During this quarter, the possibility was considered that reactively and mixed-bonded inks have a common or similar adhesion mechanism. The results of several recent experiments, which are presented, lead to the consideration of such a mechanism.

Descriptors :   *Electric conductors, *Metallizing, Thick films, Thin films, Adhesion, Gold, Inks, Substrates, Glass, Alumina, Ceramic materials, Silver, Copper, Sintering, Powder metals, Wetting, Microelectronics, Copper compounds, Aluminates

Subject Categories : Electrical and Electronic Equipment
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE