Package structures and method of forming the same

1. A method comprising:

forming a first bond pad on a bottom surface of a recess of a first substrate;

after forming the first bond pad, placing a first package on a bottom surface of a recess of a first substrate, the first package comprising a first die, wherein the bottom surface of the recess physically supports the first package after placing the first package on the bottom surface of the first substrate, wherein the recess is fully patterned in the first substrate prior to placing the first package on the bottom surface of the recess, the first package being electrically coupled to the first bond pad of the first substrate with a first conductive connector, wherein the first conductive connector is disposed on a surface of the first package facing the bottom surface of the recess; and

attaching a first sensor to the first package and the first substrate, the first sensor being electrically coupled to the first package and the first substrate.

2. The method of claim 1 , wherein the first sensor comprises a heart rate monitor, an ambient light sensor, an ultraviolet light sensor, an ambient temperature sensor, an accelerometer, a gyroscope, a magnetometer, a barometric pressure sensor, an oxymetry sensor, a global positioning system (GPS) sensor, a skin conductance sensor, a skin temperature sensor, a blood-glucose monitor, or a combination thereof.

3. The method of claim 1 further comprising:

forming a second bond pad on a first surface of the first substrate, the first surface being outside of the recess of the first substrate, the first package being electrically coupled to the second bond pad of the first substrate with a second conductive connector.

4. The method of claim 1 further comprising:

attaching a second sensor to the first package after placing a first package on the bottom surface of the recess of a first substrate, the second sensor being electrically coupled to the first package, wherein both the first sensor and the second sensor are directly bonded to a surface of the first package, and wherein the first sensor and the second sensor are further directly bonded to a second surface of the first substrate, the second surface being higher than and substantially parallel to the bottom surface of the recess of the first substrate.

5. The method of claim 1 further comprising:

attaching a third sensor to the first package and the first substrate, the third sensor being electrically coupled to the first package and the first substrate.

6. The method of claim 1 further comprising:

forming the first package, the forming the first package comprises:

at least laterally encapsulating the first die with an encapsulant, wherein at least a portion of the encapsulant is disposed in the recess; and

forming a first redistribution structure over the first die and the encapsulant, the first sensor being electrically coupled to the first redistribution structure.

7. The method of claim 6 further comprising:

forming a third bond pad in the recess of the first substrate; and

wherein the forming the first package further comprises:

forming a through via extending through the encapsulant from the first redistribution structure to a back side of the first die, an active side of the first die being coupled to the first redistribution structure, the active side being opposite the back side, the through via of the first package being electrically coupled to the third bond pad of the first substrate with a first conductive connector.

8. The method of claim 1 further comprising:

attaching a thermoelectric generator to the first package and the first substrate, the thermoelectric generator being electrically coupled to the first package.

9. The method of claim 1 further comprising:

forming the first package, the forming the first package comprises:

at least laterally encapsulating the first die and a second die with an encapsulant; and

forming a first redistribution structure over the first die, the second die, and the encapsulant, the first sensor being electrically coupled to the first redistribution structure.

10. A method comprising:

forming a first bond pad on a bottom surface of a recess of a first substrate;

forming a first package, the forming the first package comprising:

at least laterally encapsulating a first die with an encapsulant, the first die having an active side and a back side, the back side being opposite the active side;

forming a first redistribution structure over the first die and the encapsulant, the first redistribution structure being coupled to the active side of the first die; and

forming a through via extending through the encapsulant from the first redistribution structure to a level of the back side of the first die;

after forming the first bond pad, coupling the first package to a first substrate, at least a portion of the first package extending within a recess in the first substrate, wherein the recess is patterned in the first substrate prior to coupling the first package to the first substrate, and wherein the recess extends higher than the encapsulant, the through via of the first package being electrically coupled to the first bond pad of the first substrate with a first conductive connector disposed in direct contact with the first bond pad; and

bonding a first sensor to the first package and the first substrate, the first sensor being electrically coupled to the first package and the first substrate.

11. The method of claim 10 , wherein the first sensor comprises a heart rate monitor, an ambient light sensor, an ultraviolet light sensor, an ambient temperature sensor, an accelerometer, a gyroscope, a magnetometer, a barometric pressure sensor, an oxymetry sensor, a global positioning system (GPS) sensor, a skin conductance sensor, a skin temperature sensor, a blood-glucose monitor, or a combination thereof.

12. The method of claim 10 further comprising:

bonding a second sensor to the first package, the second sensor being electrically coupled to the first package.

13. The method of claim 12 , wherein the first sensor comprises a first portion directly over the recess of the first substrate and a second portion directly over a portion of the first substrate outside of the recess, wherein the first sensor spans across a gap between a sidewall of the recess of the first substrate and an exterior sidewall of the first package, and wherein the second sensor is only directly over the recess of the first substrate.

14. The method of claim 12 further comprising:

bonding a third sensor to the first package, the third sensor being electrically coupled to the first package; and

bonding a fourth sensor to the first package, the fourth sensor being electrically coupled to the first package.

15. A method comprising:

patterning a recess in a first substrate, wherein the recess exposes a first bond pad disposed on a bottom surface of the recess;

forming a first package, the forming the first package comprising:

at least laterally encapsulating a first die with an encapsulant, the first die having an active side and a back side, the back side being opposite the active side;

forming a first redistribution structure over the first die and the encapsulant, the first redistribution structure being coupled to the active side of the first die;

forming a through via extending through the encapsulant from the first redistribution structure to a level of the back side of the first die;

after patterning the recess in the first substrate, coupling the first package to a first substrate, at least a portion of the first package extending within the recess in the first substrate, the through via of the first package being electrically coupled to the first bond pad with a first conductive connector, wherein the first conductive connector is in direct contact with the first bond pad disposed on the bottom surface of the recess;

bonding a first sensor to the first package and the first substrate, the first sensor being electrically coupled to the first package and the first substrate, wherein the first sensor comprises a first portion directly over the recess of the first substrate and a second portion directly over a portion of the first substrate outside of the recess, wherein an exterior sidewall of the first sensor is disposed directly over the recess of the first substrate; and

bonding a second sensor to the first package, the second sensor being electrically coupled to the first package, wherein the second sensor is only directly over the recess of the first substrate.

16. The method of claim 15 , wherein the first sensor comprises a heart rate monitor, an ambient light sensor, an ultraviolet light sensor, an ambient temperature sensor, an accelerometer, a gyroscope, a magnetometer, a barometric pressure sensor, an oxymetry sensor, a global positioning system (GPS) sensor, a skin conductance sensor, a skin temperature sensor, a blood-glucose monitor, or a combination thereof.

17. The method of claim 15 further comprising:

forming a first bond pad on the bottom surface of the recess of the first substrate prior to coupling the first package to a first substrate, the first package being electrically coupled to the first bond pad of the first substrate with a first conductive connector, wherein the first conductive connector is disposed on a surface of the first package facing the bottom surface of the recess.

18. The method of claim 15 further comprising:

forming a second bond pad on a first surface of the first substrate, the first surface being outside of the recess of the first substrate, the first package being electrically coupled to the second bond pad of the first substrate with a second conductive connector.

19. The method of claim 15 further comprising:

bonding a third sensor to the first package, the third sensor being electrically coupled to the first package; and

bonding a fourth sensor to the first package, the fourth sensor being electrically coupled to the first package.

20. The method of claim 15 , wherein the first sensor is a thermoelectric generator, the thermoelectric generator being electrically coupled to the first package.