Terminology for use of parts outside manufacturer-specified temperature ranges

Enhancement in Thermo-Hydraulic Performance of Microchannel Heat Sink With Secondary Flows of Leaf Venation Pattern

“…Electronic cooling is one of the major applications of MCHS. The maximum operating temperature of the commercial electronic components is 343K and is 358K for industrial electronics components [25].The bottom surface temperature for conventional MCHS exceeds the maximum operating temperature for both heat fluxes. Enhanced MCHS bottom surface temperatures are below the maximum limit for a heat flux of 100 Watt per sq.cm, while for heat flux of 200 Watt per sq.cm, the bottom surface temperature is below the limit at higher flow rates only.…”

Low temperature electrical measurements of silicon bipolar monolithic microwave integrated circuit (MMIC) amplifiers

“…Uprating is a process for assessing the capability of a component to meet the performance requirements of the application in which it is used outside the manufacturerÕs specification range [2,3]. There are two low temperature uprating methods: parameter conformance and re-characterization [4,5].…”

Addressing Obsolescence—The Uprating Option

“…There are three methods to uprate parts [3], [12]: parameter conformance, parameter characterization [6], and stress balancing [4]. All three methods need to be validated for a specific application by assembly level testing.…”

“…The tests are of "go/no-go" type and are performed at the upper and 3 The term uprating was coined by Michael Pecht. lower target temperature limits. A margin of safety may be added by testing in a range wider than the target temperature range of using tighter electrical parameter limits for the test.…”