𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Surface investigation of copper in the printed circuit board

✍ Scribed by A. Manara; V. Sirtori

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
297 KB
Volume
15
Category
Article
ISSN
0142-2421

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The aim of the study was to determine both the oxidation rate of copper in the printed circuit board and the degradation of an organic compound (ENTEK) present on its surface during the different phases of circuit assembling.

A large number of samples stripped from electronic cards have been measured by XPS and Auger techniques β€˜as received’ in order to have a statistical indication of surface composition. Other samples were heated at 220Β°C in a vapour‐phase atmosphere.

A very thin layer (∼20 Γ…) is present on the copper of the printed circuit board. This layer comprises carbon, oxygen and nitrogen. After vapour‐phase treatment at 220Β°C, the layer on the copper surface increases up to ∼100 Γ… and its composition changes: carbon decreases, oxygen appears more in the β€˜lattice form’ than as hydroxide and nitrogen is present in two valence states.

πŸ“œ SIMILAR VOLUMES

Optical ellipsometry and electron spectr
Optical ellipsometry and electron spectroscopy studies of copper oxidation related to copper on printed circuit boards
✍ A. Manara; V. Sirtori; L. Mammarella πŸ“‚ Article πŸ“… 1992 πŸ› John Wiley and Sons 🌐 English βš– 751 KB

## Abstract The aim of the present work was to investigate the oxidation of pure copper samples and of those cut out from circuit boards by using optical ellipsometry XPS and AES, in order to establish whether ellipsometry alone could be used as a simple, economical means for routine analysis at th

Leaching and electrochemical recovery of
Leaching and electrochemical recovery of copper, lead and tin from scrap printed circuit boards
✍ Andrea Mecucci; Keith Scott πŸ“‚ Article πŸ“… 2002 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 158 KB

## Abstract The recovery of copper, lead and tin from scrap printed circuit boards (PCBs) has been achieved using a combination of leaching, electrochemical ion exchange and electrodeposition. A simple aqueous nitric acid stripping solution, with the concentration range of 1–6 molβ€…dm^βˆ’3^, has demon

Estimates for the partial capacitance of
Estimates for the partial capacitance of a printed circuit board via
✍ Johan C.-E. Sten; Tommi Dufva πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 206 KB

## Figure 4 Measured power output of oscillator as a function of bias voltage from y6 to y6.6 V, the oscillator offers nearly the maximum specified rated power output of the diode. A CAD technique is presented for the design of a suspended strip-line Gunn diode oscillator with an inductive termina