Laird's OptoTEC series of miniature thermoelectric modules (TEMs) is made using Laird Tlam circuit boards instead of traditional ceramic-based circuit boards. All TEMs consist of pellets of semiconductor material soldered between two circuit board substrates. Tlam is a laminated circuit board product capable of transporting heat to and from the semiconductor pellets while providing excellent heat spreading, improved reliability and low cost in high volume. This white paper discusses the performance, reliability, advantages and limitations of OptoTEC TEMs made using Tlam in addition to describing other new products using Tlam that are currently in development.