Processing solderbrace using light wavelength filter and a broadband light source
View Patent ↗Systems, methods and/or techniques for processing solderbrace using one or more light wavelength filters are described. A method of processing solderbrace material may include applying solderbrace material to a wafer, placing a light wavelength filter between the solderbrace material and a broadband light source and exposing the light wavelength filter to broadband light from the broadband light source. The light wavelength filter may block some wavelengths of light and may allow other wavelengths of light to pass through and strike the solderbrace material. In some embodiments, the light wavelength filter may be an I-Line filter that is adapted to block substantially all wavelengths of light and allow passage of I-Line wavelengths of light. In some embodiments, the light wavelength filter may be an I-Line filter that is adapted to block substantially all G-Line and H-Line wavelengths of light and allow passage of substantially all I-Line wavelengths of light.
1. A method of processing solderbrace material, the method comprising:
applying solderbrace material to a wafer;
placing a light wavelength filter between the solderbrace material and a broadband light source; and
exposing the light wavelength filter to broadband light from the broadband light source,
wherein the light wavelength filter blocks some wavelengths of light and allows other wavelengths of light to pass through and strike the solderbrace material.
2. The method of claim 1 , wherein the light wavelength filter is an I-Line filter that is adapted to block substantially all wavelengths of light and allow passage of I-Line wavelengths of light.
3. The method of claim 1 , wherein the light wavelength filter is an I-Line filter that is adapted to block substantially all G-Line and H-Line wavelengths of light and allow passage of substantially all I-Line wavelengths of light.
4. The method of claim 3 , wherein the I-Line filter is adapted to allow passage of substantially all wavelengths of light between about 350 nm and about 375 nm.
5. The method of claim 3 , wherein the I-Line filter is adapted to allow passage of substantially all I-Line wavelengths of light below about 400 nm.
6. The method of claim 3 , wherein the I-Line filter is adapted to allow passage of substantially all light with a wavelength of about 365 nm.
7. The method of claim 3 , wherein the I-Line filter is adapted to allow passage of substantially all light with a wavelength of about 365.4 nm.
8. The method of claim 2 , wherein the step of exposing the light wavelength filter to broadband light from the broadband light source includes tuning the broadband light source such that the effective intensity of I-Line light that strikes the solderbrace material below the light wavelength filter is about 1100 mj.
9. The method of claim 2 , wherein the step of exposing the light wavelength filter to broadband light from the broadband light source includes tuning the broadband light source such that the effective intensity of I-Line light that strikes the solderbrace material below the light wavelength filter is about 1300 mj.
10. The method of claim 2 , wherein the step of exposing the light wavelength filter to broadband light from the broadband light source includes tuning the broadband light source such that the effective intensity of I-Line light that strikes the solderbrace material below the light wavelength filter is about 1500 mj.
11. A method of processing solderbrace material, the method comprising:
applying solderbrace material to a wafer;
placing a light wavelength filter between the solderbrace material and a broadband light source;
exposing the light wavelength filter to broadband light from the broadband light source, wherein the light wavelength filter blocks some wavelengths of light and allows other wavelengths of light to pass through and strike the solderbrace material; and
blocking a portion of light that passes through the light wavelength filter utilizing a metal pad.
12. The method according to claim 11 , wherein the metal pad causes a portion of the solderbrace material to not be struck by light.
13. The method according to claim 11 , wherein the metal pad comprises copper.
14. The method according to claim 12 , comprising bonding the solderbrace material to the wafer in regions that are exposed to light at wavelengths that pass through the light wavelength filter.
15. The method according to claim 12 , comprising forming vias by removing solderbrace material in regions that were not struck by light.
16. The method according to claim 11 , wherein the solderbrace material comprises epoxy with filler particles.
17. The method according to claim 11 , comprising baking the wafer to cure the solderbrace material.
18. The method according to claim 17 , wherein the filler particles comprise silica.
19. The method according to claim 11 , comprising performing a post-exposure bake to the wafer after being exposed to light at wavelengths that pass through the light wavelength filter.
20. A method of processing solderbrace material, the method comprising:
applying solderbrace material to a wafer;
placing a light wavelength filter between the solderbrace material and a broadband light source;
exposing the light wavelength filter to broadband light from the broadband light source;
blocking a portion of light that passes through the light wavelength filter utilizing a metal pad; and
removing solderbrace material in regions that were not struck by light.