Integrated optical transceiver and related methods
View Patent ↗An optical transceiver includes at least one light source and at least one detector mounted on the same surface of the same substrate. The detector is to receive light from other than a light source on the surface. At least one of the light source and the detector is mounted on the surface. An optics block having optical elements for each light source and detectors is attached via a vertical spacer to the substrate. Electrical interconnections for the light source and the detector are accessible from the same surface of the substrate with the optics block attached thereto. One of the light source and the detector may be monolithically integrated into the substrate.
1. An optoelectronic package, comprising:
an optoelectronic device;
a mount supporting the optoelectronic device;
a transparent cover having at least one optical element formed thereon for relaying light between the optoelectronic device and another device; and
a spacer between the optoelectronic device and the transparent cover, the spacer being separate from the mount and the transparent cover, the spacer providing a passage therethrough between the transparent cover and the optoelectronic device, the spacer and the transparent cover sealing the optoelectronic device from environmental factors, wherein the at least one optical element is a lithograph, and the lithograph is a diffractive optical element.
2. The optoelectronic package as claimed in claim 1 , wherein the passage in the spacer has beveled sidewalls.
3. The optoelectronic package as claimed in claim 2 , wherein the beveled sidewalls have a crystalline etch angle of a material used for the spacer.
4. The optoelectronic package as claimed in claim 3 , wherein the material is silicon.
5. A method of forming an optoelectronic package, comprising:
providing an optoelectronic device on a mount;
aligning a spacer to the mount;
etching the spacer to expose the optoelectronic device, the spacer leaving the optoelectronic device exposed when aligned to the mount;
lithographically forming an optical element on a transparent cover; and
aligning the transparent cover to the spacer and the optoelectronic device, the spacer and the transparent cover sealing the optoelectronic device from environmental factors.
6. The method as claimed in claim 5 , wherein the etching occurs before the aligning.
7. The method as claimed in claim 5 , further comprising:
attaching at least two of the spacer, the cover and the mount at a wafer level to form a vertical stack; and
singulating the vertical stack to form the optoelectronic package.
8. The method as claimed in claim 5 , wherein the etching includes etching from both a front and a back of the spacer.
9. A method of forming an optoelectronic package, comprising:
providing an optoelectronic device on a mount;
etching a wafer to form a plurality of spacers;
aligning a spacer to the mount, the spacer leaving the optoelectronic device exposed when aligned to the mount;
lithographically forming an optical element on a transparent cover;
aligning the transparent cover to the spacer and the optoelectronic device, the spacer and the transparent cover sealing the optoelectronic device from environmental factors;
attaching at least two of the spacer, the cover and the mount at a wafer level to form a vertical stack; and
singulating the vertical stack to form the optoelectronic package.
10. The method as claimed in claim 9 , wherein the etching is dry etching.
11. The method as claimed in claim 9 , wherein the etching is wet etching.
12. An optoelectronic package, comprising:
an optoelectronic device;
a mount supporting the optoelectronic device;
a transparent cover; and
a spacer between the optoelectronic device and the transparent cover, the spacer being separate from the mount and the transparent cover, the spacer providing a passage therethrough between the transparent cover and the optoelectronic device, the spacer and the transparent cover sealing the optoelectronic device from environmental factors, the passage in the spacer having beveled sidewalls, wherein an angle of the beveled sidewall from a top surface of the spacer is equal to an angle of the beveled sidewall from a bottom surface of the spacer.