Compact opto-electronic modules and fabrication methods for such modules
Various optoelectronic modules are described and include one or more optoelectronic devices. Each optoelectronic module includes one or more optoelectronic devices. Sidewalls laterally surround each optoelectronic device and can be in direct contact with sides of the optoelectronic device or, in some cases, with an overmold surrounding the optoelectronic device. The sidewalls can be composed, for example, of a vacuum injected material that is non-transparent to light emitted by or detectable by the optoelectronic device. The module also includes a passive optical element. Depending on the implementation, the passive optical element can be on a cover for the module, directly on a top surface of the optoelectronic device, or on an overmold surrounding the optoelectronic device. Methods of fabricating such modules are described as well, and can facilitate manufacturing the modules using wafer-level processes.
1. An optoelectronic module comprising:
an optoelectronic device;
sidewalls laterally surrounding the optoelectronic device and in direct contact with sides of the optoelectronic device, wherein the sidewalls are composed of a material that is non-transparent to light emitted by or detectable by the optoelectronic device;
a passive optical element disposed directly on an upper surface of the optoelectronic device, wherein the passive optical element is in direct contact with the upper surface of the optoelectronic device, and wherein the passive optical element is a lens; and
electrically conductive contacts on an underside of the optoelectronic device and arranged to mount the module directly on a printed circuit board of a host device.
2. The optoelectronic module of claim 1 , wherein at least a portion of the sidewalls serves as an outer wall of the module.
3. The optoelectronic module of claim 1 , wherein the sidewalls are composed of a vacuum injected material.
4. The optoelectronic module of claim 1 , wherein the sidewalls are composed of a UV or thermally-cured polymer material containing a non-transparent filler material.
5. The optoelectronic module of claim 1 , further including a baffle laterally surrounding the passive optical element, wherein the baffle is composed of the same non-transparent material as the sidewalls.