Surface-patterned micromechanical elements by polymer injection molding with hybrid molds

Schift, Helmut; Urwyler, Prabitha; Kristiansen, Per Magnus (2013). Surface-patterned micromechanical elements by polymer injection molding with hybrid molds. Journal of Vacuum Science & Technology B, 31(6), 06FD01. AVS Publications 10.1116/1.4821649

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Hybrid molds enable the fabrication of polymeric parts with features of different length scales by injection molding. The resulting polymer microelements combine optical or biological functionalities with designed mechanical properties. Two applications are chosen for illustration of this concept: As a first example, microelements for optical communication via fiber-to-fiber coupling are manufactured by combining two molds to a small mold insert. Both molds are fabricated using lithography and electroplating. As a second example, microcantilevers (μCs) for chemical sensing are surface patterned using a modular mold composed of a laser-machined cavity defining the geometry of the μCs, and an opposite flat tool side which is covered by a patterned polymer foil. Injection molding results in an array of 35 μm-thick μCs with microscale surface topographies. In both cases, when the mold is assembled and closed, reliefs are transferred onto one surface of the molded element whose outlines are defined by the micromold cavity. The main advantage of these hybrid methods lies in the simple integration of optical surface structures and gratings onto the surface of microcomponents with different sizes and orientations. This allows for independent development of functional properties and combinations thereof.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Gerontechnology and Rehabilitation

UniBE Contributor:

Urwyler-Harischandra, Prabitha

Subjects:

600 Technology > 620 Engineering

ISSN:

2166-2746

Publisher:

AVS Publications

Language:

English

Submitter:

Prabitha Urwyler-Harischandra

Date Deposited:

11 Apr 2014 11:29

Last Modified:

11 Apr 2014 11:29

Publisher DOI:

10.1116/1.4821649

URI:

https://boris.unibe.ch/id/eprint/49020

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