Nerve impulse signal stimulation device and method for fabricating the same
A nerve impulse signal stimulation device and a method for fabricating the same are provided. The nerve impulse signal stimulation device includes: a substrate having a first surface and a second surface opposite to the first surface; a first metal layer formed on the first surface of the substrate; a second metal layer formed on the first metal layer; a plurality of openings exposing a portion of the first surface of the substrate, a portion of the first metal layer and a portion of the second metal layer; and a ferromagnetic material attached to the second surface of the substrate. The openings cause the nerve impulse signal stimulation device to obtain a parallel circuit structure, thereby increasing the current load and the magnetic field intensity, reducing the size of the device, and ensuring the safety of operations.
1. A method for fabricating a nerve impulse signal stimulation device, comprising:
providing a substrate having a first surface and a second surface opposite to the first surface;
forming a first metal layer on the first surface of the substrate;
forming a second metal layer on the first metal layer;
forming on the second metal layer a patterned resist layer that covers the second metal layer under the patterned resist layer;
continuing formation of the second metal layer on a portion of the second metal layer that is not covered by the patterned resist layer;
removing the patterned resist layer and the first metal layer and the second metal layer that are under the patterned resist layer so as to form a plurality of openings that expose a portion of the first surface of the substrate, a portion of the first metal layer and a portion of the second metal layer, wherein the second metal layer is divided by the openings into a plurality of strip-shaped structures having their ends electrically connected; and
attaching a ferromagnetic material to the second surface of the substrate.
2. The method of claim 1 , wherein each of the openings has a rib shape, and the openings are arranged in parallel to one another.
3. The method of claim 1 , wherein the first metal layer is made of titanium.
4. The method of claim 1 , wherein the second metal layer is made of copper.
5. The method of claim 1 , further comprising, after removing the patterned resist layer and the first metal layer and the second metal layer that are under the patterned resist layer, forming a third metal layer on side surfaces of the first metal layer and upper and side surfaces of the second metal layer, and forming a fourth metal layer on upper and side surfaces of the third metal layer.
6. The method of claim 1 , wherein the ferromagnetic material is made of cobalt, iron, bismanol, nickel, manganese antimonide, chromium oxide, manganese arsenide or manganese-zinc alloy.
7. A nerve impulse signal stimulation device, comprising:
a substrate having a first surface and a second surface opposite to the first surface;
a first metal layer formed on the first surface of the substrate;
a second metal layer formed on the first metal layer;
a plurality of openings exposing a portion of the first surface of the substrate, a portion of the first metal layer and a portion of the second metal layer, wherein the second metal layer is divided by the openings into a plurality of strip-shaped structures having their ends electrically connected; and
a ferromagnetic material attached to the second surface of the substrate.
8. The nerve impulse signal stimulation device of claim 7 , wherein each of the openings has a rib shape, and the openings are arranged in parallel to one another.
9. The nerve impulse signal stimulation device of claim 7 , wherein the first metal layer is made of titanium.
10. The nerve impulse signal stimulation device of claim 7 , wherein the second metal layer is made of copper.
11. The nerve impulse signal stimulation device of claim 7 , further comprising a third metal layer formed on side surfaces of the first metal layer and upper and side surfaces of the second metal layer, and a fourth metal layer formed on upper and side surfaces of the third metal layer.
12. The nerve impulse signal stimulation device of claim 7 , wherein the ferromagnetic material is made of cobalt, iron, bismanol, nickel, manganese antimonide, chromium oxide, manganese arsenide or manganese-zinc alloy.