Electrical behaviour of discontinuous silver films deposited on softened polyvinylpyridine substrates

Manjunatha Pattabi, K. Mohan Rao

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Results of the investigations carried out on the electrical behaviour of discontinuous silver films deposited on poly(2-vinylpyridine) (PVP) coated substrates held at temperatures in the range 410-475 K in a vacuum of 8 × 10-6 Torr are reported. Both the resistance immediately after deposition and the room temperature resistance show a regular dependence on thickness, for films deposited at a substrate temperature of 425 K. The films deposited at this temperature show almost zero temperature coefficient of resistance (TCR) near room temperature, whereas films deposited at higher temperatures show large negative TCR and the magnitude of TCR decreases with increasing thickness. The films show an irreversible increase of resistance during exposure to atmosphere beyond a pressure of about 5 × 10-2 Torr. A film deposited on PVP held at room temperature is more sensitive to exposure. The reduced aging in vacuum following deposition and improved stability against exposure to atmosphere of the films deposited on PVP at 425 K, in comparison with the film deposited on a rigid substrate, suggest the formation of subsurface particulate silver films. This can account for the high resistance observed, even for a 2000 Å thick film deposited on softened PVP substrates.

Original languageEnglish
Pages (from-to)19-23
Number of pages5
JournalJournal of Physics D: Applied Physics
Volume31
Issue number1
DOIs
Publication statusPublished - 07-01-1998

Fingerprint

Silver
silver
Substrates
Temperature
temperature
room temperature
coefficients
Negative temperature coefficient
atmospheres
Vacuum deposition
vacuum
high resistance
Thick films
particulates
thick films
Aging of materials
Vacuum

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

@article{540908b710414557a891e1263b6b5427,
title = "Electrical behaviour of discontinuous silver films deposited on softened polyvinylpyridine substrates",
abstract = "Results of the investigations carried out on the electrical behaviour of discontinuous silver films deposited on poly(2-vinylpyridine) (PVP) coated substrates held at temperatures in the range 410-475 K in a vacuum of 8 × 10-6 Torr are reported. Both the resistance immediately after deposition and the room temperature resistance show a regular dependence on thickness, for films deposited at a substrate temperature of 425 K. The films deposited at this temperature show almost zero temperature coefficient of resistance (TCR) near room temperature, whereas films deposited at higher temperatures show large negative TCR and the magnitude of TCR decreases with increasing thickness. The films show an irreversible increase of resistance during exposure to atmosphere beyond a pressure of about 5 × 10-2 Torr. A film deposited on PVP held at room temperature is more sensitive to exposure. The reduced aging in vacuum following deposition and improved stability against exposure to atmosphere of the films deposited on PVP at 425 K, in comparison with the film deposited on a rigid substrate, suggest the formation of subsurface particulate silver films. This can account for the high resistance observed, even for a 2000 {\AA} thick film deposited on softened PVP substrates.",
author = "Manjunatha Pattabi and Rao, {K. Mohan}",
year = "1998",
month = "1",
day = "7",
doi = "10.1088/0022-3727/31/1/003",
language = "English",
volume = "31",
pages = "19--23",
journal = "Journal Physics D: Applied Physics",
issn = "0022-3727",
publisher = "IOP Publishing Ltd.",
number = "1",

}

Electrical behaviour of discontinuous silver films deposited on softened polyvinylpyridine substrates. / Pattabi, Manjunatha; Rao, K. Mohan.

In: Journal of Physics D: Applied Physics, Vol. 31, No. 1, 07.01.1998, p. 19-23.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electrical behaviour of discontinuous silver films deposited on softened polyvinylpyridine substrates

AU - Pattabi, Manjunatha

AU - Rao, K. Mohan

PY - 1998/1/7

Y1 - 1998/1/7

N2 - Results of the investigations carried out on the electrical behaviour of discontinuous silver films deposited on poly(2-vinylpyridine) (PVP) coated substrates held at temperatures in the range 410-475 K in a vacuum of 8 × 10-6 Torr are reported. Both the resistance immediately after deposition and the room temperature resistance show a regular dependence on thickness, for films deposited at a substrate temperature of 425 K. The films deposited at this temperature show almost zero temperature coefficient of resistance (TCR) near room temperature, whereas films deposited at higher temperatures show large negative TCR and the magnitude of TCR decreases with increasing thickness. The films show an irreversible increase of resistance during exposure to atmosphere beyond a pressure of about 5 × 10-2 Torr. A film deposited on PVP held at room temperature is more sensitive to exposure. The reduced aging in vacuum following deposition and improved stability against exposure to atmosphere of the films deposited on PVP at 425 K, in comparison with the film deposited on a rigid substrate, suggest the formation of subsurface particulate silver films. This can account for the high resistance observed, even for a 2000 Å thick film deposited on softened PVP substrates.

AB - Results of the investigations carried out on the electrical behaviour of discontinuous silver films deposited on poly(2-vinylpyridine) (PVP) coated substrates held at temperatures in the range 410-475 K in a vacuum of 8 × 10-6 Torr are reported. Both the resistance immediately after deposition and the room temperature resistance show a regular dependence on thickness, for films deposited at a substrate temperature of 425 K. The films deposited at this temperature show almost zero temperature coefficient of resistance (TCR) near room temperature, whereas films deposited at higher temperatures show large negative TCR and the magnitude of TCR decreases with increasing thickness. The films show an irreversible increase of resistance during exposure to atmosphere beyond a pressure of about 5 × 10-2 Torr. A film deposited on PVP held at room temperature is more sensitive to exposure. The reduced aging in vacuum following deposition and improved stability against exposure to atmosphere of the films deposited on PVP at 425 K, in comparison with the film deposited on a rigid substrate, suggest the formation of subsurface particulate silver films. This can account for the high resistance observed, even for a 2000 Å thick film deposited on softened PVP substrates.

UR - http://www.scopus.com/inward/record.url?scp=0032491742&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032491742&partnerID=8YFLogxK

U2 - 10.1088/0022-3727/31/1/003

DO - 10.1088/0022-3727/31/1/003

M3 - Article

VL - 31

SP - 19

EP - 23

JO - Journal Physics D: Applied Physics

JF - Journal Physics D: Applied Physics

SN - 0022-3727

IS - 1

ER -