Rheology and processing of pastes for electronic packaging materials

The stencil printing of pastes (solder paste and
electrical conductive adhesives) is a very important
stage in the assembly of electronic packages. There
is wide agreement in industry that the paste printing
process accounts for the majority of assembly
defects, which originate from poor understanding of
the correlation between the paste rheology and the
printing process. The development of new pastes
formulations is a complex process. As a result more
extensive rheological characterisation techniques are
required to understand the flow behaviour of the
pastes under different shear conditions. This book
focuses on the rheological characterisation of pastes
and their correlation to the stencil printing
process. A general guideline has been developed from
the extensive set of results from this research, in
particular, on the aspect of correlating key paste
performance indicators to the rheological test
methods. The book is aimed at paste and electronic
manufacturers with an interest of incorporating
rheology as a research and quality assurance tool in
their formulation and production processes.

Autorentext

Dr.Rajkumar Durairaj is Assistant Professor of Mechanical Engineering at the Universiti Tunku Abdul Rahman (UTAR),Malaysia. His research interest is in rheological studies of nano-electronic materials. He is a Member of the Institution of Mechanical Engineers(UK) and a registered Chartered Engineer with the Engineering Council(UK).

Klappentext

The stencil printing of pastes (solder paste andelectrical conductive adhesives) is a very importantstage in the assembly of electronic packages. Thereis wide agreement in industry that the paste printingprocess accounts for the majority of assemblydefects, which originate from poor understanding ofthe correlation between the paste rheology and theprinting process. The development of new pastesformulations is a complex process. As a result moreextensive rheological characterisation techniques arerequired to understand the flow behaviour of thepastes under different shear conditions. This bookfocuses on the rheological characterisation of pastesand their correlation to the stencil printingprocess. A general guideline has been developed fromthe extensive set of results from this research, inparticular, on the aspect of correlating key pasteperformance indicators to the rheological testmethods. The book is aimed at paste and electronicmanufacturers with an interest of incorporatingrheology as a research and quality assurance tool intheir formulation and production processes.