Pastes prepared with seven lead-free glass particles were screen-printed and fired on 96\%-Al2O3 substrates. The fired films were studied in terms of sintering, devitrification, crack propagation and bleeding. The most promising glass compositions were selected for the preparation of RuO2-based thick film resistors (TFRs), on pre-fired PtAu- or PdAg-based terminations; electrical properties of the resistors (sheet resistance vs. RuO2 volume fraction, temperature coefficient of resistance and size effects) were investigated. The study evidenced a myriad of complex phenomena, including devitrification, relevant bleeding of the glass on alumina substrates, anomalous distribution of conductive grains in the glassy matrix, phase separations. Contrarily to what happens in traditional systems, it is difficult to get a wide resistance range simply by changing the fraction of the conductive phase. These results emphasize the criticality in the choice of the glass composition for the preparation of lead-free thick film resistors.

Lead-free thick film resistors: an explorative investigation / Prudenziati, Maria; F., Zanardi; Morten, Bruno; Gualtieri, Alessandro. - In: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS. - ISSN 0957-4522. - STAMPA. - 13:(2002), pp. 31-37.

Lead-free thick film resistors: an explorative investigation

PRUDENZIATI, Maria;MORTEN, Bruno;GUALTIERI, Alessandro
2002

Abstract

Pastes prepared with seven lead-free glass particles were screen-printed and fired on 96\%-Al2O3 substrates. The fired films were studied in terms of sintering, devitrification, crack propagation and bleeding. The most promising glass compositions were selected for the preparation of RuO2-based thick film resistors (TFRs), on pre-fired PtAu- or PdAg-based terminations; electrical properties of the resistors (sheet resistance vs. RuO2 volume fraction, temperature coefficient of resistance and size effects) were investigated. The study evidenced a myriad of complex phenomena, including devitrification, relevant bleeding of the glass on alumina substrates, anomalous distribution of conductive grains in the glassy matrix, phase separations. Contrarily to what happens in traditional systems, it is difficult to get a wide resistance range simply by changing the fraction of the conductive phase. These results emphasize the criticality in the choice of the glass composition for the preparation of lead-free thick film resistors.
13
31
37
Lead-free thick film resistors: an explorative investigation / Prudenziati, Maria; F., Zanardi; Morten, Bruno; Gualtieri, Alessandro. - In: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS. - ISSN 0957-4522. - STAMPA. - 13:(2002), pp. 31-37.
Prudenziati, Maria; F., Zanardi; Morten, Bruno; Gualtieri, Alessandro
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/305892
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 18
social impact