OPTOELECTRIC COMPOSITE SUBSTRATE AND ELECTRONIC APPARATUS

Abstract

An optoelectric composite substrate includes a substrate, a light emitting element positioned on the substrate, and a lens mold positioned on the light emitting element and contacting at least a part of the substrate, wherein the lens mold includes a lens element, the lens element positions so as to overlap an emitting surface of the light emitting element, and a distance between the light emitting element and the lens element is greater than a range of a Fresnel region of the light emitting element.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will now be described with reference to the accompanying drawings, wherein like numbers refer to like elements.

FIG. 1 is a perspective view showing a substantial part of an optoelectric composite substrate according to a first embodiment of the invention.

FIG. 2 is a cross-sectional view along the A-A line shown in FIG. 1.

FIG. 3 is a cross-sectional view showing a modified example of the optoelectric composite substrate according to the first embodiment of the invention.

FIG. 4 is a cross-sectional view showing a substantial part of an optoelectric composite substrate according to a second embodiment of the invention.

FIG. 5 is a cross-sectional view showing a substantial part of an optoelectric composite substrate according to a third embodiment of the invention.

FIG. 6 is a cross-sectional view showing a substantial part of an optoelectric composite substrate according to a fourth embodiment of the invention.

FIG. 7 is a cross-sectional view showing a substantial part of an optoelectric composite substrate according to a fifth embodiment of the invention.

FIG. 8 is a block diagram showing a control section of a low-profile optical element 13.

FIG. 9 is a cross-sectional view showing the first process of a manufacturing method of the low-profile optical element 13.

FIG. 10 is a cross-sectional view showing the second process of the manufacturing method of the low-profile optical element 13.

FIG. 11 is a cross-sectional view showing the third process of the manufacturing method of the low-profile optical element 13.

FIG. 12 is a cross-sectional view showing the fourth process of the manufacturing method of the low-profile optical element 13.

FIG. 13 is a cross-sectional view showing the fifth process of the manufacturing method of the low-profile optical element 13.

FIG. 14 is a cross-sectional view showing the first process of a mounting method of the low-profile optical element 13.

FIG. 15 is a cross-sectional view showing the second process of the mounting method of the low-profile optical element 13.

FIG. 16 is a cross-sectional view showing the third process of the mounting method of the low-profile optical element 13.

FIGS. 17A through 17C are cross-sectional views showing a forming method of a lens mold 14.

FIGS. 18A through 18C are cross-sectional views showing another forming method of the lens mold 14.

FIGS. 19A through 19C are perspective views showing examples of an electronic apparatus according to the invention.

Claims

1. An optoelectric composite substrate, comprising: a substrate;a light emitting element positioned over the substrate; anda lens mold positioned over the light emitting element and contacting at least a part of the substrate, the lens mold including a lens element that is positioned so as to overlap an emitting surface of the light emitting element, and a distance between the light emitting element and the lens element being greater than a range of a Fresnel region of the light emitting element.

2. The optoelectric composite substrate according to claim 1, a distance between the light emitting element and the lens element being within a range of a Fraunhofer region of the light emitting element.

3. The optoelectric composite substrate according to claim 1, assuming that a diameter of a near-field pattern of the light emitted by the light emitting element being D and a wavelength thereof being λ, a Fraunhofer region of the light emitted from the light emitting element being an area with a greater distance from the light emitting element than the distance L=D2/λ.

4. The optoelectric composite substrate according to claim 1, the light emitting element being a VCSEL, and the Fresnel region being a distance between an active layer of the VCSEL and the lens element.

5. The optoelectric composite substrate according to claim 1, further comprising: an electric circuit that is disposed on the substrate, the electric circuit being electrically connected to the light emitting element via a wiring pattern, and a part of the electric circuit contacting the lens mold.

6. The optoelectric composite substrate according to claim 1, the lens mold being made of resin.

7. The optoelectric composite substrate according to claim 1, the lens mold including a coloring matter.

8. The optoelectric composite substrate according to claim 1, further comprising: an insulation film that is disposed between the light emitting element and the lens mold.

9. The optoelectric composite substrate according to claim 1, further comprising: an insulation film that is disposed between the light emitting element and the lens mold, the thickness of the insulation film being a half as thick as a wavelength of a light emitted by the light emitting element.

10. The optoelectric composite substrate according to claim 1, the lens element being formed inside the lens mold.

11. The optoelectric composite substrate according to claim 1, the lens element being a gradient-index lens based on gradient index formed inside the lens mold.

12. The optoelectric composite substrate according to claim 1, the lens element being one of a Fresnel lens provided to the surface of the lens mold, a diffraction grating, and a refracting lens.

13. An optoelectric composite substrate, comprising: a substrate;a light receiving element positioned over the substrate; anda lens mold positioned over the light receiving element and contacting at least a part of the substrate, the lens mold including a lens element that is positioned so as to overlap a receiving surface of the light receiving element, the lens mold being made of resin.

14. The optoelectric composite substrate according to claim 13, the lens element being positioned over the surface of the lens mold.

15. The optoelectric composite substrate according to claim 13, the lens element being positioned inside the lens mold.

16. The optoelectric composite substrate according to claim 13, further comprising an insulation film that is disposed between the light receiving element and the lens mold, the thickness of the insulation film being a quarter as thick as a wavelength of a light to be input to the light receiving element.

17. An optoelectric composite substrate, comprising: a substrate;a light emitting element positioned on the substrate;a light receiving element positioned on the substrate;a first electric circuit positioned on the substrate and electrically connected to the light emitting element via a first wiring pattern;a second electric circuit positioned on the substrate and electrically connected to the light receiving element via a second wiring pattern; anda lens mold positioned on the light emitting element and the light receiving element and contacting at least a part of the substrate, at least a part of the first electric circuit, and at least a part of the second electric circuit, the lens mold including a first lens element and a second lens element, the first lens element being positioned so as to overlap an emitting surface of the light emitting element, and the second lens element being positioned so as to overlap an receiving surface of the light receiving element.

18. The optoelectric composite substrate according to claim 15, further comprising: an insulation film that is disposed between the light receiving element and the lens mold, the thickness of the insulation film being a quarter as thick as a wavelength of a light to be input to the light receiving element.

19. An electronic apparatus comprising the optoelectric composite substrate according to claim 1.