Coated package with filter profile
View Patent ↗Method for packaging a photo detector integrated circuit (IC) and a pigment filter and resulting package are described. An encapsulated package (e.g., an epoxy-encapsulated package) that includes a first surface is provided. A filter layer is then coated directly onto the first surface. The filter layer provides optical filtering properties (e.g., a predetermined filtering profile) in addition to the filtering provided by the pigment filter.
1. An integrated circuit color sensor package, comprising:
an integrated circuit die comprising a color sensor photodetector and a first light filter disposed over the photodetector, the color sensor photodetector being incorporated into and forming a portion of the integrated circuit die, the first light filter being a photosensitive organic color filter;
a substrate upon which the integrated circuit is mounted;
wherein at least portions of the first light filter, the integrated circuit die and the substrate are encapsulated by a light transmissive epoxy encapsulant comprising an upper surface; and
a coating disposed over at least portions of the upper surface and above the first light filter, the coating being configured to form a second light filter.
2. The package of claim 1 , wherein the second light filter is an interference filter.
3. The package of claim 2 , wherein the interference filter includes an infrared (IR) block filter.
4. The package of claim 2 , wherein the package is configured for high volume manufacturing; and wherein the second light filter is formed directly on a plurality of encapsulated packages in high density form.