Correlation between thermal resistance, channel temperature, infrared thermal maps and failure mechanisms in low power MESFET devices
Channel temperature T ch of GaAs MESFETs, determined by means of electrical measurements ( ΔV gs), has been compared and correlated with thermal maps obtained by high resolution infrared microscopy. Results show that in low power devices with a small number of gates, the value of T ch derived from Δ...
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Published in | Microelectronics and reliability Vol. 29; no. 2; pp. 117 - 124 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Oxford
Elsevier Ltd
1989
Elsevier |
Subjects | |
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Abstract | Channel temperature
T
ch of GaAs MESFETs, determined by means of electrical measurements (
ΔV
gs), has been compared and correlated with thermal maps obtained by high resolution infrared microscopy. Results show that in low power devices with a small number of gates, the value of
T
ch derived from
ΔV
gs measurements is close to the maximum values of temperature measured on the hottest junctions on the chip. Local thermal inhomogeneities, in particular those observed in devices characterized by high values of
R
th, can explain and confirm results of failure analyses of MESFETs submitted to accelerated life tests in operating conditions where degradation phenomena occur in localized areas of the device. |
---|---|
AbstractList | Channel temperature T sub(ch) of GaAs MESFETs, determined by means of electrical measurements ( Delta V sub(gs)), has been compared and correlated with thermal maps obtained by high resolution infrared microscopy. Results show that in low power devices with a small number of gates, the value of T sub(ch) derived from Delta V sub(gs) measurements is close to the maximum values of temperature measured on the hottest junctions on the chip. Local thermal inhomogeneities, in particular those observed in devices characterized by high values of R sub(th), can explain and confirm results of failure analyses of MESFETs submitted to accelerated life tests in operating conditions where degradation phenomena occur in localized areas of the device. Channel temperature T ch of GaAs MESFETs, determined by means of electrical measurements ( ΔV gs), has been compared and correlated with thermal maps obtained by high resolution infrared microscopy. Results show that in low power devices with a small number of gates, the value of T ch derived from ΔV gs measurements is close to the maximum values of temperature measured on the hottest junctions on the chip. Local thermal inhomogeneities, in particular those observed in devices characterized by high values of R th, can explain and confirm results of failure analyses of MESFETs submitted to accelerated life tests in operating conditions where degradation phenomena occur in localized areas of the device. |
Author | Donzelli, G. Magistrali, F. Chiussi, F. Canali, C. Zanoni, E. |
Author_xml | – sequence: 1 givenname: C. surname: Canali fullname: Canali, C. organization: Dipartimento di Elettronica ed Informatica, Universita' di Padova, Via Gradenigo 6/A, 35131 Padova, Italy – sequence: 2 givenname: F. surname: Chiussi fullname: Chiussi, F. – sequence: 3 givenname: G. surname: Donzelli fullname: Donzelli, G. – sequence: 4 givenname: F. surname: Magistrali fullname: Magistrali, F. – sequence: 5 givenname: E. surname: Zanoni fullname: Zanoni, E. organization: Dipartimento di Elettrotecnica ed Elettronica, Universita' di Bari, Via Re David 200, 70125 Bari, Italy |
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Cites_doi | 10.1049/el:19870060 10.1109/EDL.1986.26338 10.1002/j.1538-7305.1979.tb02244.x |
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References | Walshak, Poole (BIB6) Feb. 1977; 1977 Fukui (BIB7) 1979; 58 Canali, Castaldo, Fantini, Ogliari, Umena, Zanoni (BIB8) 1986; EDL-7 Canali, Chiussi, Umena, Vanzi, Zanoni (BIB10) 1987 (BIB5) 1977 Wemple, Huang (BIB2) 1982 Webb (BIB4) 1983; 130 Webb (BIB3) 1987; 134 Canali, Donzelli, Fantini, Vanzi, Paccagnella (BIB9) 1987; 23 Fukui (BIB1) 1980; 1980 Fukui (10.1016/0026-2714(89)90556-8_BIB7) 1979; 58 Webb (10.1016/0026-2714(89)90556-8_BIB4) 1983; 130 Canali (10.1016/0026-2714(89)90556-8_BIB8) 1986; EDL-7 Wemple (10.1016/0026-2714(89)90556-8_BIB2) 1982 Walshak (10.1016/0026-2714(89)90556-8_BIB6) 1977; 1977 Canali (10.1016/0026-2714(89)90556-8_BIB9) 1987; 23 Webb (10.1016/0026-2714(89)90556-8_BIB3) 1987; 134 Canali (10.1016/0026-2714(89)90556-8_BIB10) 1987 Fukui (10.1016/0026-2714(89)90556-8_BIB1) 1980; 1980 (10.1016/0026-2714(89)90556-8_BIB5) 1977 |
References_xml | – volume: 58 start-page: 771 year: 1979 end-page: 797 ident: BIB7 article-title: Determination of the basic device parameters of a GaAs MESFET publication-title: Bell Syst. Tech. J. contributor: fullname: Fukui – volume: 1980 start-page: 118 year: 1980 end-page: 121 ident: BIB1 article-title: Thermal resistance of GaAs field-effect transistors publication-title: IEDM Tech. Dig. contributor: fullname: Fukui – volume: 1977 start-page: 23 year: Feb. 1977 end-page: 25 ident: BIB6 article-title: Thermal resistance measurement by IR scanning publication-title: Microwave J. contributor: fullname: Poole – start-page: 309 year: 1982 end-page: 348 ident: BIB2 article-title: Thermal design of power GaAs FET's publication-title: GaAs Principles and Technology contributor: fullname: Huang – start-page: 613 year: 1987 end-page: 616 ident: BIB10 article-title: Effects of high current and temperature in power MESFET metallizations publication-title: Proceedings of ESSDERC '87 contributor: fullname: Zanoni – volume: 134 start-page: 51 year: 1987 end-page: 56 ident: BIB3 article-title: Measurements of thermal resistance using electrical methods publication-title: IEE Proc. contributor: fullname: Webb – volume: 23 start-page: 83 year: 1987 end-page: 84 ident: BIB9 article-title: Gold-based gate-sinking enhanced by inhomogeneities in power MESFET's publication-title: Electron. Lett. contributor: fullname: Paccagnella – volume: EDL-7 start-page: 185 year: 1986 ident: BIB8 article-title: Gate metallization sinking into the active channel in Ti/W/Au metallized power MESFET's publication-title: IEEE Electron. Device Lett. contributor: fullname: Zanoni – year: 1977 ident: BIB5 article-title: Device thermal resistance measurement by IR scanning publication-title: MSC Application note GP-201 – volume: 130 start-page: 153 year: 1983 end-page: 159 ident: BIB4 article-title: Measurements of thermal transients in semiconductor power devices and circuits publication-title: IEE Proc. contributor: fullname: Webb – volume: 23 start-page: 83 issue: 2 year: 1987 ident: 10.1016/0026-2714(89)90556-8_BIB9 article-title: Gold-based gate-sinking enhanced by inhomogeneities in power MESFET's publication-title: Electron. Lett. doi: 10.1049/el:19870060 contributor: fullname: Canali – volume: 134 start-page: 51 year: 1987 ident: 10.1016/0026-2714(89)90556-8_BIB3 article-title: Measurements of thermal resistance using electrical methods contributor: fullname: Webb – start-page: 613 year: 1987 ident: 10.1016/0026-2714(89)90556-8_BIB10 article-title: Effects of high current and temperature in power MESFET metallizations contributor: fullname: Canali – volume: EDL-7 start-page: 185 year: 1986 ident: 10.1016/0026-2714(89)90556-8_BIB8 article-title: Gate metallization sinking into the active channel in Ti/W/Au metallized power MESFET's publication-title: IEEE Electron. Device Lett. doi: 10.1109/EDL.1986.26338 contributor: fullname: Canali – volume: 1977 start-page: 23 year: 1977 ident: 10.1016/0026-2714(89)90556-8_BIB6 article-title: Thermal resistance measurement by IR scanning publication-title: Microwave J. contributor: fullname: Walshak – volume: 58 start-page: 771 year: 1979 ident: 10.1016/0026-2714(89)90556-8_BIB7 article-title: Determination of the basic device parameters of a GaAs MESFET publication-title: Bell Syst. Tech. J. doi: 10.1002/j.1538-7305.1979.tb02244.x contributor: fullname: Fukui – volume: 1980 start-page: 118 year: 1980 ident: 10.1016/0026-2714(89)90556-8_BIB1 article-title: Thermal resistance of GaAs field-effect transistors publication-title: IEDM Tech. Dig. contributor: fullname: Fukui – start-page: 309 year: 1982 ident: 10.1016/0026-2714(89)90556-8_BIB2 article-title: Thermal design of power GaAs FET's contributor: fullname: Wemple – volume: 130 start-page: 153 year: 1983 ident: 10.1016/0026-2714(89)90556-8_BIB4 article-title: Measurements of thermal transients in semiconductor power devices and circuits contributor: fullname: Webb – year: 1977 ident: 10.1016/0026-2714(89)90556-8_BIB5 article-title: Device thermal resistance measurement by IR scanning publication-title: MSC Application note GP-201 |
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Snippet | Channel temperature
T
ch of GaAs MESFETs, determined by means of electrical measurements (
ΔV
gs), has been compared and correlated with thermal maps obtained... Channel temperature T sub(ch) of GaAs MESFETs, determined by means of electrical measurements ( Delta V sub(gs)), has been compared and correlated with thermal... |
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SubjectTerms | Applied sciences Electronics Exact sciences and technology Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Transistors |
Title | Correlation between thermal resistance, channel temperature, infrared thermal maps and failure mechanisms in low power MESFET devices |
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