The purpose of this work has been to develop a new measuring principle to bring down the time for quality assurance, and obtain larger uniformity of the end product, in a specific production line. The production concerns thin transparent micro membranes (approx 35 micron thickness) dispensed in micro cavities, each membrane consisting of several membrane layers. A quality control should be performed every time a new layer is dispensed. The paper describes a new way of measuring membrane thickness. The method was achieved through the use of a vision system, whereby the thickness of the thin transparent micro membrane is determined in terms of the light absorbance of the membrane substrate. The new and faster measuring method makes is possible to measure the thickness of individual membranes and perform a 100% quality control.
|Title of host publication||10th CIRP International Conference on Computer Aided Tolerancing : Specification and Verification for Assemblies|
|Place of Publication||Germany, Erlangen|
|Publication status||Published - 2007|
|Event||10th CIRP International Conference on Computer Aided Tolerancing : Specification and Verification for Assemblies - Germany, Erlangen|
Duration: 21 Mar 2007 → 23 Mar 2007
|Conference||10th CIRP International Conference on Computer Aided Tolerancing : Specification and Verification for Assemblies|
|Period||21/03/2007 → 23/03/2007|
- Dimensional metrology, Measurement instrument, Quality assurance.