Image sensor camera module and method of fabricating the same
The invention involves an image sensor camera module and a method of fabricating the image sensor camera module. The image sensor camera module uses a single-body type lens holder defined by a hollow cylindrical body having a shoulder protruding radially inwardly from an inner surface thereof. First and second lenses therein are spaced apart by a first spacer and a filter therein is spaced from the second lens by a second spacer. An image sensor is adhered to a lower rim of the body, and the filter is adhered to an upper rim thereof. All optical elements within the lens holder thus are affixed in fixed relative position compatible with a predefined focal length and axis. Moreover, the adhesively sealed interior of the body of the image sensor camera module prevents particulate contamination.
1. An image sensor camera module comprising:
a lens holder defined by a single generally cylindrical body having an opening extending axially therethrough;
a first lens installed inside the lens holder;
a second lens disposed in the lens holder;
a spacer disposed in the lens holder;
an image sensor comprising an upper surface directly adhered to an inner surface of the cylindrical body; and
a circuit board electrically coupled to terminals of the image sensor;
wherein:
a thickness of the spacer aligns the first lens and the second lens to focus an image on the image sensor;
the terminals of the image sensor are disposed on a first surface of the image sensor; and
a second surface of the image sensor that is opposite to the first surface is adhered to the inner surface of the cylindrical body.
2. The image sensor camera module of claim 1 , wherein the inner surface of the lens holder includes a generally planar substantially contiguous peripheral inward protrusion to support the first lens.
3. The image sensor camera module of claim 1 , wherein a filling adhesive is filled between the body of the lens holder and the circuit board.
4. The image sensor camera module of claim 1 , wherein the second lens is spaced apart from and above the first lens via the spacer.
5. The image sensor camera module of claim 4 , further comprising a filter placed above the second lens.
6. The image sensor camera module of claim 5 , wherein the lens holder, the first lens, the image sensor, the circuit board, the second lens and the filter are all affixed in a predefined fixed positional relationship to one another that defines an aligned and fixed-distance focal length at least as among the first and second lens and the image sensor.
7. The image sensor camera module of claim 1 , wherein the spacer is disposed in the lens holder to isolate the first lens from the second lens.
8. The image sensor camera module of claim 1 , wherein the lens holder and the circuit board are separated by a filling adhesive.
9. An image sensor camera module comprising:
a lens holder defined by a hollow cylindrical body with an axial opening therethrough into which first and second lenses are inserted in spaced-apart relationship from each other;
a filter adhered to an inner surface of a first rim of the lens holder above the second lens to expose an outer surface of the filter;
an image sensor including an upper surface, the upper surface being adhered to the inner surface of the lens holder under the first lens; and
a circuit board electrically coupled to terminals of the image sensor adjacent a second opposite rim of the lens holder;
wherein a filling adhesive is filled between the lens holder and the circuit board.
10. The image sensor camera module of claim 9 , wherein the body of the lens holder includes a generally planar substantially contiguous peripheral inward protrusion to support the first lens.
11. The image sensor camera module of claim 10 , wherein the image sensor is adhered adjacent the second rim of the body of the lens holder to a lower surface of the protrusion using an adhesive.
12. The image sensor camera module of claim 9 , wherein the filter is adhered to the inner surface of the body of the lens holder adjacent the first rim thereof to seal an interior of the lens holder.
13. An image sensor camera module comprising:
a lens holder defined by a single generally cylindrical body having an opening extending axially therethrough;
a first lens installed inside the lens holder;
a second lens disposed in the lens holder;
a spacer disposed in the lens holder;
an image sensor comprising an upper surface directly adhered to an inner surface of the cylindrical body; and
a circuit board electrically coupled to terminals of the image sensor;
wherein a thickness of the spacer aligns the first lens and the second lens to focus an image on the image sensor and a filling adhesive is filled between the body of the lens holder and the circuit board.
14. An image sensor camera module comprising:
a lens holder defined by a single generally cylindrical body having an opening extending axially therethrough;
a first lens installed inside the lens holder;
a second lens disposed in the lens holder;
a spacer disposed in the lens holder;
an image sensor comprising an upper surface directly adhered to an inner surface of the cylindrical body; and
a circuit board electrically coupled to terminals of the image sensor;
wherein a thickness of the spacer aligns the first lens and the second lens to focus an image on the image sensor and the lens holder and the circuit board are separated by a filling adhesive.
15. An image sensor camera module comprising:
a lens holder defined by a hollow cylindrical body with an axial opening therethrough into which first and second lenses are inserted in spaced-apart relationship from each other;
a filter adhered to an inner surface of a first rim of the lens holder above the second lens to expose an outer surface of the filter;
an image sensor including an upper surface, the upper surface being adhered to the inner surface of the lens holder under the first lens; and
a circuit board electrically coupled to terminals of the image sensor adjacent a second opposite rim of the lens holder,
wherein:
the terminals of the image sensor are disposed on a first surface of the image sensor; and
a second surface of the image sensor that is opposite to the first surface is adhered to the inner surface of the cylindrical body.