Victor A. Lifton, Gregory Lifton and Steve Simon
This study aims to investigate the options for additive rapid prototyping methods in microelectromechanical systems (MEMS) technology. Additive rapid prototyping technologies…
Abstract
Purpose
This study aims to investigate the options for additive rapid prototyping methods in microelectromechanical systems (MEMS) technology. Additive rapid prototyping technologies, such as stereolithography (SLA), fused deposition modeling (FDM) and selective laser sintering (SLS), all commonly known as three-dimensional (3D) printing methods, are reviewed and compared with the resolution requirements of the traditional MEMS fabrication methods.
Design/methodology/approach
In the 3D print approach, the entire assembly, parts and prototypes are built using various plastic and metal materials directly from the software file input, completely bypassing any additional processing steps. The review highlights their potential place in the overall process flow to reduce the complexity of traditional microfabrication and long processing cycles needed to test multiple prototypes before the final design is set.
Findings
Additive manufacturing (AM) is a promising manufacturing technique in micro-device technology.
Practical implications
In the current state of 3D printing, microfluidic and lab-on-a-chip devices for fluid handling and manipulation appear to be the most compatible with the 3D print methods, given their fairly coarse minimum feature size of 50-500 μm. Future directions in the 3D materials and method development are identified, such as adhesion and material compatibility studies of the 3D print materials, wafer-level printing and conductive materials development. One of the most important goals should be the drive toward finer resolution and layer thickness (1-10 μm) to stimulate the use of the 3D printing in a wider array of MEMS devices.
Originality/value
The review combines two discrete disciplines, microfabrication and AM, and shows how microfabrication and micro-device commercialization may benefit from employing methods developed by the AM community.
Details
Keywords
This is a comparison of the emotions we have in watching a movie with those we have in everyday life. Everyday emotion is loose in frame or context but rather controlled and…
Abstract
This is a comparison of the emotions we have in watching a movie with those we have in everyday life. Everyday emotion is loose in frame or context but rather controlled and regulated in content. Movie emotion, in contrast, is tightly framed and boundaried but permissive and uncontrolled in content. Movie emotion is therefore quite safe and inconsequential but can still be unusually satisfying and pleasurable. I think of the movie emotions as modeling clay that can symbolize all sorts of human troubles. A major function of movies then is catharsis, a term I use more inclusively than usual.
Throughout I use a pragmatist approach to film theory. This position gives the optimal distance to the study of ordinary, middle-level emotion. In contrast psychoanalysis is too close and cognitive theory too distant. This middle position is similar to Arlie Hochschild’s symbolic interactionist approach to the sociology of emotions, which also mediates between psychoanalysis and cognitive theories.
Officially, of course, the world is now post-imperial. The Q’ing and Ottoman empires fell on the eve of World War I, and the last Leviathans of Europe's imperial past, the…
Abstract
Officially, of course, the world is now post-imperial. The Q’ing and Ottoman empires fell on the eve of World War I, and the last Leviathans of Europe's imperial past, the Austro-Hungarian and Tsarist empires, lumbered into the grave soon after. Tocsins of liberation were sounded on all sides, in the name of democracy (Wilson) and socialism (Lenin). Later attempts to remake and proclaim empires – above all, Hitler's annunciation of a “Third Reich” – now seem surreal, aberrant, and dystopian. The Soviet Union, the heir to the Tsarist empire, found it prudent to call itself a “federation of socialist republics.” Mao's China followed suit. Now, only a truly perverse, contrarian regime would fail to deploy the rhetoric of democracy.