Analysis of UV cured Optical Bonds and Methods for Volume Testing
- New principles for high-speed testing -
There are several „classical“ methods – but then you have destruction.
But there are some – trial – methods for NON destruction.
To name two of them:
- color dispersion across all viewing angles ... and a bit simpler
- 4-side spectral measurement ... beside other
And on top: how to then select the UV-driven problems out of it?
→ But there is a selective method!
Examples for optical appearance of improper UV-bonding
Major root-cause of UV-bonding problems: Ongoing exchange of UV-sources for UV-bonding
Differences in severeness of UV bonding issues - 1
Selective analyzing optical bonds made by UV-resinAll samples shown are real products – failing at end-customer in field use analysed by our new method
WITHOUT any destruction or delamination of device
WITHOUT interference of integrated display
WITH very high sensitivity
VERY QUICK, time requirement for data aquisition starting at approx. 500ms
Differences in severeness of UV bonding issues - 2
Selective analyzing optical bonds made by UV-resinSamples from different customers using different kind of UV resins – selected for similar size/shape only to better compare
USEFULL for any size - so far used from below 1" to 86"
VERY selective - also for issuses beside UV-bonding problems
Can be used MICROSCOPIC or MACROSCOPIC
New analysis method from Wammes & Partner provides:
- A NON-destructive approach
- A strict focus of the bonding layer only
- High sensitivity
- Short testing time
- Applicability to a broad size range
- Wide range of detailing from microscopic to macroscopic
- Usability also for issues apart from UV-resin based bonding
Very high confidence level of results
How we do - some insights
ONE shot delivers different information
And every pattern is very selective for its own and very dedicated purpose
Some examples (highlighted in colors):
RED – we call „Placks“ - selective for UV-bonding issues
GREEN – we call „Spätzle“ (german type of noodle) - selective for polymerisation issues
BLUE – we call „Sandpaper“ - selective for surface activation/surface energy issues
Application pictures of improper optical bonding
Our approach to the market
- we already offer such UV-bonding analysis as a service (beside lots of other technical services)
- we seek for partners (licensees, measurement equipment companies,…)
- for parties interested in IP and service we offer dedicated (Teams-)meetings and webinars. Please feel free to contact us.