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Article history: Available online xxxx a b s t r a c t A reliability test bench dedicated to RF power devices is used to improve 330 W LDMOS in a radar conditions. The monitoring of RF power, drain, gate voltages and currents under various pulses and temperatures conditions are investigated. Numerous duty cycles are applied in order to stress LDMOS. It(More)
AlGaN/GaN HEMTs are on the way to lead the RF-power amplification field according to their outstanding performances. However, due to its relative youth, reliability studies in several types of operating conditions allow to understand mechanisms peculiar to this technology and responsible for the wearing out of devices. This paper reports the reliability(More)
This paper presents measurement of AlGaN/GaN HEMT temperature with two techniques. Coupling of infrared thermography and electrical characterization of drain current shows good agreement of both techniques. They are complementary and may allow spatial cartography of HEMT channel temperature. By applying these methods to life test and coupling it to physical(More)
Reliability knowledge of AlGaN/GaN High Electron Mobility Transistors (HEMT) remains a major challenge to provide safe power devices. In order to understand degradation mechanisms related to this technology, accurate life tests must be performed. In this paper, saturated-pulsed-RF stress tests at enhanced drain bias voltage are performed on an AlGaN/GaN(More)
This paper reports a methodology to correlate Hot Carrier Injection (HCI) degradation mechanism regarding to electrical figures of merit on Lateral-Diffused Metal-Oxide-Semiconductor (LDMOS) transistor. This method is based on RF life test in radar operating conditions coupled to a high drain voltage in order to make visible HCI degradation. We propose(More)
Failure mechanisms in AlGaN/GaN HEMT RF power amplifiers implemented on silicon substrate and envisaging radar operating conditions are investigated in this paper. Several power amplifier prototypes have been designed, fabricated, characterized, and tested. Ageing tests were performed in conditions as close as possible to real applications. Ageing under(More)