Spatial heat distribution of inkjet printed heaters in comparison to planar milled circuit board heaters for biosensing applications

Abstract

The heat transfer method can be used in biosensing applications to detect analytes. Until now, the heater module always consisted of a heating element and copper heat-spreader. In order to improve the sensitivity of the sensors, a planar heating- and sensing element is proposed. Milling of circuit boards is an established method for creating planar heaters. An alternative has recently emerged in the form of inkjet printing. In this work, a comparison of the heat distribution is made between milled circuit board heaters on a fibreglass substrate and inkjet printed heaters on a flexible PET substrate.