Molten-Alloy Driven Self-Assembly for Nano and Micro Scale System Integration

Self-assembly is emerging as one of the main methods for constructionof heterogeneous systems consisting of multiple component types in nano- and micro-scales. The engineered self-assemblyusedfor sys- tem integrationinvolves preparation ofparts that can rec- ognize and bind to each other or a template, and perfec- tion ofprocedures that allow for high yieldself-assembly of these parts into a system. Capillary forces resultant from molten alloys are attractive candidates for driving such self-assembly processes as they can simultaneously provideelectrical and mechanical connections. The basic self-assembly process is reviewed here. Selection of the appropriate alloy, a critical issue in development of the self-assembly mechanism, is discussed and various can- didates are identified. Examples are provided in which alloys are used to interconnect parts in nano- and micro- scales or produce three-dimensional structures. We con- clude with a brief discussion of opportunities and chal- lenges ahead in the development of system integration processes taking advantage of self-assembly.

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