Substrate container with window retention spring

1. A substrate container comprising:

a reticle container having a base plate and a cover, the cover adapted to engage the base plate defining an enclosure, the base plate including at least one window having:

a mounting recess including a first recess sidewall, a bottom sidewall, and an undercut defined second recess sidewall, wherein together the first recess sidewall and the bottom sidewall define a lip,

a transparent substrate disposed in the mounting recess and supported on the lip, and

a retention member having an arcuate portion extending between a first end portion and a second end portion, wherein the first end portion is positioned in the undercut defined in the recess sidewall and the arcuate portion of the retention member contacts the transparent substrate to retain the transparent substrate in the mounting recess and wherein the retention member is constructed from a material having a modulus of elasticity (E) of about 15 psi×10 3 to about 30 psi×10 3 .

2. The substrate container of claim 1 , wherein the mounting recess further comprises:

a first recess defined by a first recess sidewall and a first bottom sidewall; and

a second recess in the first bottom sidewall of the first recess, the second recess defined by a second recess sidewall and a second bottom sidewall, the second recess sidewall and the second bottom sidewall defining a shape for receiving the transparent substrate at least partially within the second recess; and

wherein the second bottom sidewall defines the lip in the mounting recess that supports the transparent substrate.

3. The substrate container of claim 1 , wherein the material is selected from the group consisting of spring steel, medium carbon steel, high carbon steel, stainless steel, non-ferrous alloys, high-temperature alloys.

4. The substrate container of claim 1 , wherein the material is selected from the group consisting of perfluoroalkoxy alkane, polytetrafluoroethylene, polyetherimide, and polydimethylsiloxane.

5. The substrate container of claim 1 , wherein the retention member is constructed from spring steel.

6. The substrate container of claim 1 , wherein the second end portion of the retention member is secured to the base plate.

7. The substrate container of claim 6 , wherein the second end portion of the retention member is secured to the base plate via a screw.

8. The substrate container of claim 1 , wherein the mounting recess further includes a pair of opposing recess side walls and each of the pair of opposing recess sidewalls includes an undercut defined therein.

9. The substrate container of claim 8 , wherein the second end portion of the retention member is positioned in a second undercut defined in an opposing recess sidewall of the pair of opposing recess sidewalls.

10. The substrate container of claim 8 , wherein the undercut portions defined in each of the recess sidewalls further define an overhang.

11. The substrate container of claim 10 , wherein each of the first and second end portions of the retention member are positioned in the undercut portions defined in the recess sidewalls and retained in place via the overhangs.

12. The substrate container of claim 1 , the window further comprising an aperture defined in the bottom sidewall of the mounting recess.

13. The substrate container of claim 1 , wherein a size and shape of the mounting recess corresponds to the size and shape of the transparent substrate disposed therein.

14. The substrate container of claim 1 , further comprising two or more windows.

15. The substrate container of claim 1 , further comprising an outer pod an outer pod including an upper portion configured to mate with a bottom portion defining an outer enclosure, wherein the base plate and cover are contained within the outer enclosure defined by the outer pod.