Articles from January 1997 Issue

Electrical temperature measurement using semiconductors

January 1st, 1997

Introduction Semiconductor junctions offer many useful properties including inherentcharacteristics which are well suited to temperature measurement. Within theelectronics cooling arena, these properties form the basis for “theelectrical method of junction temperature measurement” and are used…read more

Measuring chip temperatures with thermochromic liquid crystals

January 1st, 1997

Introduction Measurement of the temperature distribution of an operating electroniccomponent, including its junction and case temperatures, is necessary tocompletely characterize the thermal and electrical performance of today’s highpower density electronic components. As part of the…read more

Microthermal imaging in the infrared

January 1st, 1997

John McDonald, Latigo Optics and Grant Albright EDO/Barnes Engineering Division Introduction Infrared imaging methods provide unequaled ease and flexibility forinvestigating micro-circuit temperatures. The researcher need only slide thecircuit under the objective lens and power it…read more

Technical Data

January 1st, 1997

In many cases, especially in the earliest phases of the product creation process, it may be necessary for the Designer to make rough calculations as to the thermal behavior of the proposed product. If a…read more

Temperature measurement using optical fibers

January 1st, 1997

Introduction Fiber optic temperature measurement has been in use for decades1.The most prevalent methods are fluorescent and radiation thermometry, also knownas pyrometry. Fluorescent temperature measurement is used for lower-rangemeasurements from -200°C to +450°C. Pyrometry best…read more

Notes on Using Thermocouples

January 1st, 1997

Introduction Thermocouples are the most widely used temperature sensor in test anddevelopment work. Accurate temperature measurements can be made at low costwith shop-built probes and ordinary low-level voltmeters. What Are Thermocouples and How Do They…read more