Manufacturing method of substrate with through electrode
A manufacturing method of a substrate with through electrodes, comprising a substrate having through holes, and through electrodes received in the through holes, includes a through electrode formation step of forming the through electrodes on a support plate, a substrate formation step of forming the substrate, a through electrode reception step of stacking the substrate on the support plate 45 and receiving the through electrodes in the through holes, a resin filling step of filling gaps between side surfaces of the through electrodes and inner walls of the through holes of the substrate 11 with a resin, and a support plate removal step of removing the support plate after the resin filling step.
1. A manufacturing method of a substrate with a through electrode, comprising:
a through electrode formation step of forming a diffusion preventive film on a support plate and then forming a through electrode on a first surface of the diffusion preventive film;
a substrate formation step of forming a substrate having a through hole;
after the through electrode formation step and the substrate formation step, a through electrode reception step of stacking the substrate on the support plate and receiving the through electrode in the through hole such that a first surface of the substrate is flush with a second surface of the diffusion preventive film opposite to the first surface of the diffusion preventive film;
after the through electrode reception step, a resin filling step of filling a gap between a side surface of the through electrode and an inner wall of the through hole of the substrate with a resin;
a support plate removal step of removing the support plate after the resin filling step to expose the flush first surface of the substrate and the second surface of the diffusion preventive film; and
a wiring layer formation step of forming a wiring layer, which is electrically connected to the through electrode, on a second surface of the substrate opposite to the first surface of the substrate, between the resin filling step and the support plate removal step.
2. The manufacturing method of a substrate with a through electrode as claimed in claim 1 , wherein in the through electrode formation step, the through electrode is formed by electrolytic plating.
3. The manufacturing method of a substrate with a through electrode as claimed in claim 1 , wherein the through electrode formation step includes forming the diffusion preventive film and the through electrode to have an equal and uniform diameter.
4. The manufacturing method of a substrate with a through electrode as claimed in claim 1 , wherein the substrate formation step includes forming the substrate to have a height substantially equal to a summed height of the through electrode and diffusion preventive film,
said height of the substrate being a distance between the first surface of the substrate and a second surface of the substrate opposite to the first surface of the substrate, and said summed height of the through electrode and diffusion preventive film being a distance between the second surface of the diffusion preventive film and a distal surface of the through electrode spaced from and opposed to the first surface of the diffusion preventive film.
5. The manufacturing method of a substrate with a through electrode as claimed in claim 4 , wherein the through electrode reception step further includes stacking the substrate on the support plate and receiving the through electrode in the through hole such that the distal surface of the through electrode is flush with the second surface of the substrate.
6. The manufacturing method of a substrate with a through electrode as claimed in claim 1 , further comprising a fixing step, between the through electrode formation step and the resin filling step, of holding the substrate such that a position of the substrate relative to the through electrode and support plate is not displaced.
7. The manufacturing method of a substrate with a through electrode as claimed in claim 1 , wherein the resin filling step further includes covering a substrate second surface with the resin, the substrate second surface being opposite to the substrate first surface.
8. A manufacturing method of a substrate with a through electrode, comprising:
a through electrode formation step of forming a diffusion preventive film on a support plate and then forming a through electrode on a first surface of the diffusion preventive film;
a substrate formation step of forming a substrate having a through hole;
after the through electrode formation step and the substrate formation step, a through electrode reception step of stacking the substrate on the support plate and receiving the through electrode in the through hole such that a first surface of the substrate is flush with a second surface of the diffusion preventive film opposite to the first surface of the diffusion preventive film;
after the through electrode reception step, a resin filling step of filling a gap between a side surface of the through electrode and an inner wall of the through hole of the substrate with a resin; and
a support plate removal step of removing the support plate after the resin filling step to expose the flush first surface of the substrate and the second surface of the diffusion preventive film,
wherein the through electrode reception step includes receiving the through electrode in the through hole such that the side surface of the through electrode is spaced from the inner wall of the through hole, and the resin filling step includes filling the gap between the inner wall of the through hole and the side surface of the through electrode such that a surface formed by the resin is flush with the first surface of the substrate and the second surface of the diffusion preventive film.
9. The manufacturing method of a substrate with a through electrode as claimed in claim 8 , wherein the substrate formation step includes forming the through hole to have a diameter greater than a diameter of the through electrode and the diffusion preventive film.
10. The manufacturing method of a substrate with a through electrode as claimed in claim 8 , wherein the support plate removal step further includes removing the support plate to expose the flush first surface of the substrate, second surface of the diffusion preventive film, and surface of the resin.
11. The manufacturing method of a substrate with a through electrode as claimed in claim 8 , wherein in the through electrode formation step, the through electrode is formed by electrolytic plating.
12. The manufacturing method of a substrate with a through electrode as claimed in claim 8 , wherein the through electrode formation step includes forming the diffusion preventive film and the through electrode to have an equal and uniform diameter.
13. The manufacturing method of a substrate with a through electrode as claimed in claim 8 , wherein the substrate formation step includes forming the substrate to have a height substantially equal to a summed height of the through electrode and diffusion preventive film,
said height of the substrate being a distance between the first surface of the substrate and a second surface of the substrate opposite to the first surface of the substrate, and said summed height of the through electrode and diffusion preventive film being a distance between the second surface of the diffusion preventive film and a distal surface of the through electrode spaced from and opposed to the first surface of the diffusion preventive film.
14. The manufacturing method of a substrate with a through electrode as claimed in claim 13 , wherein the through electrode reception step further includes stacking the substrate on the support plate and receiving the through electrode in the through hole such that the distal surface of the through electrode is flush with the second surface of the substrate.
15. The manufacturing method of a substrate with a through electrode as claimed in claim 8 , further comprising a fixing step, between the through electrode formation step and the resin filling step, of holding the substrate such that a position of the substrate relative to the through electrode and support plate is not displaced.
16. The manufacturing method of a substrate with a through electrode as claimed in claim 8 , wherein the resin filling step further includes covering a substrate second surface with the resin, the substrate second surface being opposite to the substrate first surface.
17. The manufacturing method of a substrate with a through electrode as claimed in claim 8 , further comprising:
a wiring layer formation step of forming a wiring layer, which is electrically connected to the through electrode, on a second surface of the substrate opposite to the first surface of the substrate, between the resin filling step and the support plate removal step.