Application of MALDI-MSI for Photolithographic Materials
-
Crecelius, Anna; Steinacker, Ralf; Meier, Alexander; Alexandrov, Theodore; J\", ; urgen Vitz, ; Schubert, Ulrich S.
- Year:
- 2012
- Type of Publication:
- Article
- Journal:
- Analytical Chemistry
- Volume:
- 84
- Pages:
- 6921 - 6925
- Note:
- The aim of this contribution is the application of
matrix-assisted laser desorption/ionization mass spectrometric
imaging (MALDI-MSI) in the area of photolithographic structuring.
As proof of concept, this method was used to image an
UV exposed negative photoresist layer, which is generally used
to manufacture printed circuit boards (PCB) for electronic components.
The negative photoresist layer consisting of the main
component novolac, benzophenone as the active component,
and the solvent tetrahydrofuran was mixed with the matrix
dithranol and the salt additive LiTFA and spin-coated onto an
ITO-conductive glass slide. To imprint an image on the created
surface, a transparency with a printed wiring diagram was placed
on top of it and irradiated by UV light for 15 min. The inspection of the efficient imprinting of the microstructure onto the
photoresist layer was performed by MALDI-MSI. This unique application represents a further step toward the surface analysis of
polymer films by this emerging life science imaging technique.