CN-224218760-U - Secondary plastic package stacked crystal type optical coupler packaging structure

CN224218760UCN 224218760 UCN224218760 UCN 224218760UCN-224218760-U

Abstract

A secondary plastic package stacked crystal type optical coupler packaging structure comprises a first guide pin, a second guide pin, a photoelectric unit, a light-transmitting insulating block, a light-emitting unit and a light-reflecting colloid, wherein the second guide pin is adjacently arranged on the first guide pin, the photoelectric unit is arranged on the first guide pin, the light-transmitting insulating block is arranged on the photoelectric unit, the light-emitting unit is arranged on the light-transmitting insulating block, and the light-reflecting colloid is used for coating the photoelectric unit, the light-transmitting insulating block and the light-emitting unit.

Inventors

LIANG WEICHENG
SU ZHAOGEN

Assignees

喆富创新科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250423

Claims (10)

1. The utility model provides a secondary plastic envelope stacks brilliant optocoupler packaging structure which characterized in that includes: A first pin; the second guide pin is adjacently arranged on the first guide pin; the photoelectric unit is arranged on the first guide pin; the light-transmitting insulating block is arranged on the photoelectric unit; A light-emitting unit disposed on the light-transmitting insulating block, and And the reflective colloid is used for coating the photoelectric unit, the light-transmitting insulating block and the light-emitting unit.
2. The package structure of claim 1, wherein the reflective colloid comprises titanium dioxide.
3. The package structure of claim 1, wherein the reflective colloid is substantially white in color.
4. The package structure of claim 1, wherein the reflective encapsulant has a reflectivity in an operating spectral range of the light emitting unit.
5. The secondary plastic according to claim 4 a packaging structure of a packaged crystal optical coupler, the reflective property is that the reflectance is 50% or more.
6. The secondary plastic package stacked die optocoupler package of claim 1, further comprising: and the packaging colloid is used for coating a part of the first lead pin, a part of the second lead pin, the photoelectric unit, the light-transmitting insulating block, the light-emitting unit and the light-reflecting colloid.
7. The secondary plastic according to claim 6 a packaging structure of a packaged crystal optical coupler, the packaging colloid is characterized in that the color of the packaging colloid is black.
8. The package structure of claim 6, wherein the encapsulant has an opacity within an operating spectral range of the light emitting unit.
9. The package structure of claim 8, wherein the light-tightness is 10% or less.
10. The package structure of claim 1, wherein the light-transmitting insulating block is sandwiched between the optoelectronic unit and the light-emitting unit.

Description

Secondary plastic package stacked crystal type optical coupler packaging structure Technical Field The utility model relates to a secondary plastic package stacked crystal type optical coupler packaging structure. Background Optocouplers, which may also be referred to as Photo Coupler (optocoupler), optoisolators and optoisolators, are devices that transmit electrical signals through the medium of light such as visible light or infrared light. The optocoupler has the characteristic of electrical isolation between the input circuit and the output circuit. The common stacked crystal optical coupler packaging structure is provided with a light-emitting unit, a light-transmitting insulating block and a photoelectric unit, and the packaging is completed by once plastic packaging the components through black glue. When the light-emitting unit emits light, the light can penetrate through the light-transmitting insulating block and then be received by the photoelectric unit. Thereby achieving the effect of the optical coupler. However, the light emitted by the light emitting unit of the general stacked-crystal optocoupler package structure may be emitted from the side wall of the transparent insulating block and absorbed by the black glue, so that part of the light is not received by the optoelectronic unit, resulting in poor energy conversion rate between the light emitted by the light emitting unit and the light received by the optoelectronic unit. If the driving power of the light emitting unit is increased in order to make the photoelectric unit receive enough light, electric energy is wasted. In view of this, how to improve the energy conversion rate between the light emitting unit and the photoelectric unit of the stacked-die optocoupler package structure is one of the problems to be solved currently. Disclosure of utility model The utility model provides a secondary plastic package stacked crystal optical coupler packaging structure which can improve the energy conversion rate between a light emitting unit and a photoelectric unit of the stacked crystal optical coupler packaging structure. The utility model provides a secondary plastic package stacked crystal type optical coupler packaging structure which comprises a first guide pin, a second guide pin, a photoelectric unit, a light-transmitting insulating block, a light-emitting unit and a light-reflecting colloid, wherein the second guide pin is adjacently arranged on the first guide pin, the photoelectric unit is arranged on the first guide pin, the light-transmitting insulating block is arranged on the photoelectric unit, the light-emitting unit is arranged on the light-transmitting insulating block, and the light-reflecting colloid is used for coating the photoelectric unit, the light-transmitting insulating block and the light-emitting unit. In certain embodiments, the reflective colloid comprises titanium dioxide. In some embodiments, the reflective colloid is substantially white in color. In some embodiments, the reflective colloid has reflectivity in the operating spectrum of the light emitting unit. In some embodiments, the reflectivity is 50% or greater. In some embodiments, the secondary plastic package stacked crystal optical coupler packaging structure further comprises a packaging colloid, wherein the packaging colloid coats a part of the first lead, a part of the second lead, the photoelectric unit, the light-transmitting insulating block, the light-emitting unit and the light-reflecting colloid. In some embodiments, the encapsulant is substantially black in color. In some embodiments, the encapsulant has light opacity in the operating spectral range relative to the light emitting unit. In certain embodiments, the opacity is 10% or less. In some embodiments, the light-transmitting insulating block is sandwiched between the optoelectronic unit and the light-emitting unit. Therefore, the secondary plastic package stacked crystal optical coupler packaging structure disclosed by the utility model enables an input electric signal source to be converted into an optical signal and then into an electric signal, and keeps electrical isolation, so that the secondary plastic package stacked crystal optical coupler packaging structure has good electrical insulation capability and anti-interference capability. The secondary plastic package stacked crystal optical coupler packaging structure can prevent circuit components at the rear end from being damaged by imperfect input electric signal sources, lightning, electrostatic discharge, electromagnetic interference and switching pulse waves. The first guide pin can support the photoelectric unit through the light-transmitting insulating block, so that the photoelectric unit is not required to be arranged on other supporting structures. Furthermore, the secondary plastic package stacked crystal optical coupler packaging structure has reflective colloid, so that the path of light transmitted to the photoelectr