Optocoupler devices
Optocoupler devices and methods for making and using such devices are described. The optocoupler devices contain a light emitting component (a light emitting diode [LED]) and a light receiving component (a phototransistor [PT]) device that are embedded within the substrate, rather than being attached to the surface of the pre-molded substrate. Such a configuration eliminates the bond wires that are often used when the LED and PT are attached on the substrate, improves the electrical performance, and allows the final optocoupler package to be made smaller and thinner. Other embodiments are described.
1. An optocoupler package, comprising:
a light emitting component;
a light receiving component;
a substrate enclosing the light emitting component and the light receiving component except for an upper surface and a portion of a side surface thereof;
solder balls located on an upper surface of the substrate;
terminals located on a bottom surface of the substrate;
an upper metal trace structure connecting the light emitting and light receiving components with the solder balls; and
a lower metal trace structure connecting the light emitting and light receiving components with the terminals.
2. The optocoupler package of claim 1 , wherein the light emitting component comprises a light emitting diode.
3. The optocoupler package of claim 1 , wherein the light receiving component comprises a phototransistor.
4. The optocoupler package of claim 1 , wherein the substrate comprises a resin material.
5. The optocoupler package of claim 4 , wherein the substrate comprises a prepreg material.
6. The optocoupler package of claim 1 , wherein the light emitting component and light receiving component are contained in separate dies.
7. The optocoupler package of claim 1 , further comprising a partially or completely optically transparent material covering the light emitting component and the light receiving component.
8. The optocoupler package of claim 7 , further comprising an optically reflective material overlying the optically transparent material.
9. The optocoupler package of claim 1 , wherein the package has a size less than about 2.2 mm by about 2.2 mm and a thickness less than about 0.8 mm.
10. An electronic device containing an optocoupler package, the package comprising:
a light emitting component;
a light receiving component;
a substrate enclosing the light emitting component and the light receiving component except for an upper surface and a portion of a side surface thereof;
solder balls located on an upper surface of the substrate;
terminals located on a bottom surface of the substrate;
an upper metal trace structure connecting the light emitting and light receiving components with the solder balls; and
a lower metal trace structure connecting the light emitting and light receiving components with the terminals.
11. The device of claim 10 , wherein the light emitting component comprises a light emitting diode.
12. The device of claim 10 , wherein the light receiving component comprises a phototransistor.
13. The device of claim 10 , wherein the substrate comprises a resin material.
14. The device of claim 13 , wherein the substrate comprises a prepreg material.
15. The device of claim 10 , wherein the light emitting component and light receiving component are contained in separate dies.
16. The device of claim 10 , further comprising a partially or completely optically transparent material covering the light emitting component and the light receiving component.
17. The device of claim 16 , further comprising an optically reflective material overlying the optically transparent material.
18. The device of claim 10 , wherein the package has a size less than about 2.2 mm by about 2.2 mm and a thickness less than about 0.8 mm.
19. An optocoupler device, comprising:
a light emitting diode contained in a first die;
a phototransistor contained in a second die;
a substrate comprising a resin material and enclosing the light emitting diode and the phototransistor except for an upper surface and a portion of a side surface thereof;
solder balls located on an upper surface of the substrate;
terminals located on a bottom surface of the substrate;
an upper metal trace structure connecting the light emitting diode and phototransistor with the solder balls; and
a lower metal trace structure connecting the light emitting diode and phototransistor with the terminals.
20. The device of claim 19 , wherein the device has a size less than about 2.2 mm by about 2.2 mm and a thickness less than about 0.8 mm.