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Optimizing NiCr Layer Uniformity on Grid Spacers for Enhanced Electrical Contact

This study focuses on depositing a NiCr layer on grid spacers to improve electrical contact. Initial observations show promising results in NiCr electrode appearance and edge sharpness. By analyzing resistance values on the grid spacer, it was noted that thickness non-uniformity exists with a need for enhancement to achieve a target thickness of 50nm for optimal electrical contact. Data plots and cross-section analyses reveal the thickness distribution across different groups of glass samples, with variations observed between the grid and glass sample averages. Further adjustments are suggested to improve uniformity and achieve consistent thickness for reliable electrical connections.

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Optimizing NiCr Layer Uniformity on Grid Spacers for Enhanced Electrical Contact

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Presentation Transcript

  1. Electrical measurements of sputtered NiCr on grid spacers (GS2mm) 07-11-2011 Dean Walters, Anil Mane Guy Harris, Jeff Elam

  2. ObjectiveTo deposit NiCr layer(150-200nm/side) on grid spacers for better electrical contact. As received After NiCr coating • Appearance of NiCr coated grid looks good

  3. Photograph after NiCr electrode Glass • Grid edges are sharp but much better than previous vender • Overall deposition looks great. NiCr

  4. Thickness values based on Resistance on the grid spacer 1 2 3 4 5 6 Considered Bulk rho of NiCr 7 8 9 10 11 12 13 14 15 16 17 Similar number and trend observed for other side of the grid spacer • Thickness non-uniformity on the grid spacer • We need to improve the Thickness NU and then we can target thickness= 50nm • I think 50nm uniform thickness of NiCr will be sufficient for good electrical contact?

  5. Rings of Equal Thickness (nm) – Anil’s data

  6. 3D Plot and Diagonal Cut • Making a cut through the data using both diagonals a cross section plot was made.

  7. Four groups of glass samples were coated while being taped onto the surface of the tooling.They were in locations 4, 12, 6, 14 for each set. QCM=20 Grp 1 QCM=30 Grp 2 QCM=40 Grp 3 QCM=20 Grp 4

  8. Conclusion • Grid Data • Average of the data was 18 nm • Maximum of data was 36.8 nm • Data from Flat Glass Samples • Average of Group #1 is 60 nm • Average of Group #2 is 84 nm • Average of Group #3 is 125 nm • The setup for Group #1 (& #4) were the same as the grid data. • There is nearly a 4X difference between those averages and the is a 2X difference the maximum point and the samples.

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