Advanced microwave oven for rapid curing of encapsulant

K. I. Sinclair, T. Tilford, G. Goussetis, C. Bailey, M. P Y Desmulliez, A. K. Parrott, A. J. Sangster

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


The curing of a thermosetting polymer materials utilized on micro-electronics packaging applications can be performed using microwave systems. The use of microwave energy enables the cure process to be completed more rapidly than with alternative approaches due to the ability to heat volumetrically. Furthermore, advanced dual-section microwave systems enable curing of individual components on a chip-on-board assembly. The dielectric properties of thermosetting polymer materials, commonly used in microelectronics packaging applications, vary significantly with temperature and degree of cure. The heating rate within a material subjected to an electric field is primarily dependant on the dielectric loss properties of the material itself. This article examines the variation in dielectric properties of a commercially available encapsulant paste with frequency and temperature and the resulting influence on the cure process. The 'FAMOBS' dual section microwave system and its application to microelectronics manufacture are described. The measurement of the dielectric properties of 'Henkel EO1080' encapsulant paste uses a commercially available 'dielectric probe kit' and is described in this paper. The FAMOBS heating system is used to encapsulate a small op-amp chip. A numerical model formulated to assess the cure process in thermosetting polymer materials under microwave heating is outlined. Numerical results showing that the microwave processing systems is capable of rapidly and evenly curing thermosetting polymer materials are presented. ©2008 IEEE.

Original languageEnglish
Title of host publicationProceedings - 2008 2nd Electronics Systemintegration Technology Conference, ESTC
Number of pages6
Publication statusPublished - 2008
Event2008 2nd Electronics Systemintegration Technology Conference - Greenwich, United Kingdom
Duration: 1 Sept 20084 Sept 2008


Conference2008 2nd Electronics Systemintegration Technology Conference
Abbreviated titleESTC
Country/TerritoryUnited Kingdom

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