Optocoupler with light guide defining element

An optocoupler comprising:

• a plurality of conductive leads;
• a first optical transmitter die configured to emit light, the first optical transmitter die configured to receive power through one of the plurality of conductive leads;
• a first optical receiver die configured to receive light emitted by the first optical transmitter die, the first optical receiver die configured to be powered to receive power through one of the plurality of conductive leads;
• a substantially transparent encapsulant at least partially encapsulating at least a portion of the plurality of conductive leads, the first optical transmitter die and the first optical receiver die, the substantially transparent encapsulant configured to form a light guide to transfer light from the first optical transmitter die to the first optical receiver die;
• a light guide defining element, the light guide defining element having at least one cavity configured to bound the substantially transparent encapsulant, so as to define the shape of the substantially transparent encapsulant as the substantially transparent encapsulant is hardened from liquid form;
• and
• an opaque encapsulant encapsulating the light guide defining element and a substantial portion of the plurality of conductive leads;
• wherein the light guide defining element is formed from one of:
• polycarbonate, high index plastic and acrylic plastic materials.

An optocoupler comprising:

• a substrate;
• a first optical transmitter die located on the substrate configured to emit light, the first optical transmitter die configured to receive a first power;
• a first optical receiver die located on the substrate, the first optical receiver die configured to receive light emitted by the first optical transmitter die and configured to receive a second power;
• a substantially transparent encapsulant encapsulating a portion of the substrate, the first optical transmitter die and the first optical receiver die, wherein the substantially transparent encapsulant is hardened from liquid form to fowl a light guide configured to transfer light from the first optical transmitter die to the first optical receiver die;
• a light guide defining element attached to the substrate, the light guide defining element having a cavity configured to bound the substantially transparent encapsulant when the transparent encapsulant is in liquid form and define therein at least a portion of the shape of the substantially transparent encapsulant to form the light guide;
• an aperture on the light guide defining element configured to prevent air from being trapped inside the cavity;
• and
• an opaque encapsulant encapsulating the light guide defining element and a substantial portion of the substrate.