Circuit board assembly and method for manufacturing the same
A circuit board assembly includes an inner circuit substrate, a first outer circuit substrate, a second outer circuit substrate, a heat conducting block, an electronic component, and a reinforcing plate. The first outer circuit substrate and second outer circuit substrate are disposed on surfaces of the inner circuit substrate. The heat conducting block penetrates through the inner circuit substrate and connects to the first outer circuit substrate and the second outer circuit substrate. The heat conducting block made of aluminum nitride. An electronic component at least partially accommodated in the heat conducting block. The reinforcing plate is disposed on a surface of the second outer circuit substrate corresponding to the electronic component and faces away from the electronic component. The present disclosure further provides a method for manufacturing the circuit board assembly.
1. A circuit board assembly, comprising:
an inner circuit substrate;
a first outer circuit substrate disposed on a surface of the inner circuit substrate;
a second outer circuit substrate disposed on another surface of the inner circuit substrate away from the first outer circuit substrate;
a heat conducting block penetrating through the inner circuit substrate and connecting to each of the first outer circuit substrate and the second outer circuit substrate, and an accommodating groove with an opening towards the first outer circuit substrate defined on the heat conducting block, the heat conducting block made of aluminum nitride;
a lens module comprising a chip and a lens, the chip accommodated in the accommodating groove and electrically connected to the first outer circuit substrate, the lens disposed on a surface of the first outer circuit substrate and electrically connected to the chip, and the chip and the lens cooperatively forming a hollow cavity; and
a reinforcing plate disposed on a surface of the second outer circuit substrate corresponding to the lens module and facing away from the lens module.
2. The circuit board assembly of claim 1 , wherein the circuit board assembly further comprises a heat conducting filler, and the heat conducting filler is disposed between the chip and the heat conducting block.
3. The circuit board assembly of claim 1 , wherein the first outer circuit substrate comprises a first outer circuit layer, the second outer circuit substrate comprises a second outer circuit layer, a metal layer is disposed on a surface of the heat conducting block facing the first outer circuit substrate and a surface facing the second outer circuit substrate, the metal layer is connected to the first outer circuit layer and the second outer circuit layer.
4. The circuit board assembly of claim 1 , wherein the circuit board assembly further comprises a connecting block, the second outer circuit substrate comprises a second outer dielectric layer and a second outer circuit layer stacked with each other, and the connecting block connects the heat conducting block and the second outer circuit layer.
5. A method for manufacturing a circuit board assembly, the method comprising providing an inner circuit substrate with a through hole; placing a heat conducting block in the through hole, and the heat conducting block made of aluminum nitride; forming a first outer circuit substrate and a second outer circuit substrate on opposite surfaces of the inner circuit substrate, the first outer circuit substrate and the second outer circuit substrate covering the heat conducting block; forming an accommodating groove penetrating through the first outer circuit substrate and recessed toward the heat conducting block; at least partially accommodating a lens module in the accommodating groove comprising: accommodating a chip of the lens module in the accommodating groove such that an electrical connection portion of the chip is exposed, and electrically connecting the chip to the first outer circuit substrate; and connecting a lens of the lens module to a surface of the first outer circuit substrate, and electrically connecting the lens to the chip, the chip and the lens cooperatively forming a hollow cavity; and forming a reinforcing plate on a surface of the second outer layer circuit substrate corresponding to the lens module and facing away from the lens module.
6. The method of claim 5 , wherein the first outer circuit substrate comprises a first outer dielectric layer the second outer circuit substrate comprises a second outer dielectric layer; both the first outer dielectric layer and the second outer dielectric layer are connected to the heat conducting block.
7. The method of claim 5 , wherein before accommodating the chip in the accommodating groove, the method further comprises:
filling a heat conducting filler in the accommodating groove, causing the chip to be spaced apart from the heat conducting block.
8. The method of claim 5 , wherein the second outer circuit substrate comprises a second outer dielectric layer and a second outer circuit layer stacked with each other, forming the second outer circuit substrate further comprises forming a connecting block connecting the heat conducting block and the second outer circuit layer.
9. The method of claim 5 , wherein forming the reinforcing plate is after forming the second outer circuit substrate.
10. The method of claim 5 , wherein a metal layer is disposed on a surface of the heat conducting block, the first outer circuit substrate comprises a first outer circuit layer, and the second outer circuit substrate comprises a second outer circuit layer, the first outer circuit layer and the second outer circuit layer are directly connected to the metal layer.