Search Menu
Photonics Media Photonics Buyers' Guide Photonics Spectra BioPhotonics EuroPhotonics Vision Spectra Photonics Showcase Photonics ProdSpec Photonics Handbook
More News

Researchers Use High-Power Diode Lasers to Microweld Thermoplastics

Facebook Twitter LinkedIn Email Comments
SANTA CLARA, Calif., June 14 -- Ohio State University researchers are using a Coherent Inc. high-power diode laser system to microweld thermoplastics that may enable lower-cost, disposable MEMS device housings for biomedical engineering, communications and sensor applications.

"One of the hottest topics in engineering research and development is micro electro-mechanical systems (MEMS)," said David Grewell, a researcher at Ohio State. "We feel that thermoplastics' chemically inert nature, low cost and ease of processing gives them a potential for use as MEMS device housing in a wide variety of applications. And, in fact, the low manufacturing cost of polymers may allow industry to fabricate disposable MEMS. But rapid, consistent and inexpensive assembly or packaging is critical to the commercialization of polymer-based MEMS."

One promising method of joining thermoplastics for MEMS housings is direct diode laser transmission welding. In this process, a laser beam passes through one of the components to be joined and is focused on the second absorbing material. Using a Coherent near-infrared F-package system, Ohio State University researchers have generated welds less than 15-µm wide. This small seam could be especially relevant in the production of small-scale biotechnology MEMS devices.

According to Grewell, diode lasers are ideal for high-precision welding because the power is controllable down to a very low level of fluence. However, on this small scale, weld testing, quality assurance and process control are far more challenging than for larger welds. Each of these stages is currently under study at Ohio State. In addition, process modeling is underway to improve theoretical understanding of the process.
Jun 2002
Basic ScienceCommunicationsindustrialNews & FeaturesSensors & Detectors

back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2020 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA,

Photonics Media, Laurin Publishing
x We deliver – right to your inbox. Subscribe FREE to our newsletters.
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.