Wiring board having connecting wiring between electrode plane and connecting pad
View Patent ↗It is to provide a wiring board for a semiconductor integrated circuit package, which exhibits an excellent signal property and a high effect for decreasing the switching noise at the time of mounting an LSI of an area-array structure. In a multilayer wiring board for a package, which comprises, on a wiring layer of an LSI chip mount surface, a ground pad, a power supply pad, and a signal pad for mounting LSI chip, and a ground plane that extends around a group of those pads, the ground pad disposed on the inner side, among the above-described pads, is connected to the ground plane that surrounds the pad group through a connecting wiring.
1. A wiring board for a semiconductor integrated circuit package, comprising:
a plurality of metal layers including a ground plane, a power supply plane, and a signal wiring layer which are stacked;
a surface layer in which an electronic device mount part is surrounded by an electrode plane, wherein the electronic device mount part has device connecting pads arranged in an area-array form;
ground pads and power supply pads arranged on an inner side of the electronic device mount part; and
connecting wiring for connecting between the electrode plane and one of the connecting pads having a same potential as the electrode plane wherein the electrode plane, the one of the connecting pads, and the connecting wiring are disposed on a same layer.
2. The wiring board for a semiconductor integrated circuit package according to claim 1 , wherein the electrode plane is a surface ground plane, and the same potential connecting pads are the ground pads.
3. The wiring board for a semiconductor integrated circuit package according to claim 1 , wherein the electrode plane is a surface power supply plane, and the same potential connecting pads are the power supply pads.
4. The wiring board for a semiconductor integrated circuit package according to claim 1 , wherein the connecting wiring is formed in a mesh-like form.
5. The wiring board for a semiconductor integrated circuit package according to claim 2 , wherein the surface ground plane is formed over an entire surface, except for an opening with a device connecting pad other than the ground pad; and the ground pad is formed on the surface ground plane.
6. The wiring board for a semiconductor integrated circuit package according to claim 3 , wherein: the surface power supply plane is formed over an entire surface, except for an opening with a device connecting pad other than the power supply pad; and the power supply pad is formed on the surface power supply plane.
7. The wiring board for a semiconductor integrated circuit package according to claim 2 , wherein: an inner-layer ground plane is provided in addition to the surface ground plane; and the inner-layer ground plane is adjacent to the power supply plane that is provided in an inner layer.
8. The wiring board for a semiconductor integrated circuit package according to claim 3 , wherein: an inner-layer power supply plane is provided in addition to the surface power supply plane; and the inner-layer power supply plane is adjacent to the ground plane that is provided in an inner layer.
9. The wiring board for a semiconductor integrated circuit package according to claim 1 , wherein the signal wiring layer is formed adjacent to a surface ground plane or a surface power supply plane, which constitute a surface plane.
10. The wiring board for a semiconductor integrated circuit package according to claim 2 , wherein the signal wiring layer is interposed between the surface ground plane and the ground plane or the power supply plane provided in an inner layer.
11. The wiring board for a semiconductor integrated circuit package according to claim 3 , wherein the signal wiring layer is interposed between the surface power supply plane and the ground plane or the power supply plane provided in an inner layer.
12. The wiring board for a semiconductor integrated circuit package according to claim 1 , comprising a capacitor mount part which has a capacitor mounting ground pad and a capacitor mounting power supply pad.
13. The wiring board for a semiconductor integrated circuit package according to claim 1 , wherein: on a wiring layer that is a electronic device mount surface, a capacitor mount part which has a capacitor mounting ground pad and a capacitor mounting power supply pad is provided outside the electronic device mount part; a capacitor mounting ground pad is provided on a surface ground plane that comprises the surface layer; and an opening for a capacitor mounting power supply pad is formed on the surface ground plane.
14. The wiring board for a semiconductor integrated circuit package according to claim 1 , wherein: on a wiring layer that is a electronic device mount surface, a capacitor mount part which has a capacitor mounting ground pad and a capacitor mounting power supply pad is provided outside the electronic device mount part; a capacitor mounting power supply pad is provided on a surface power supply plane that comprises the surface layer; and an opening for a capacitor mounting ground pad is formed on the surface power supply plane.
15. The wiring board for a semiconductor integrated circuit package according to claim 1 , wherein venting holes are formed on at least one layer of the ground plane or the power supply plane, which comprise the surface layer.
16. A semiconductor integrated circuit, comprising:
a plurality of metal layers including a ground plane, a power supply plane, and a signal wiring layer which are stacked;
a surface layer in which an electronic device mount part is surrounded by an electrode plane;
an electronic device mount part in which device connecting pads are arranged in an area-array form;
ground pads and power supply pads arranged on an inner side of the electronic device mount part;
a connecting wiring for connecting between the electrode plane and one of the connecting pads having a same potential as the electrode plane wherein the electrode plane, the connecting wiring and the one of the connecting pads are disposed on a same layer; and
an electronic device mounted on the electronic device mount part.
17. The semiconductor integrated circuit according to claim 16 , wherein the electronic device is any one of devices selected from a semiconductor chip, a semiconductor device in which a semiconductor chip is mounted on a circuit board, and a semiconductor device in which a semiconductor chip is sealed by resin.
18. The semiconductor integrated circuit according to claim 16 , wherein the electronic device is mounted on a wiring board for a semiconductor integrated circuit package through a bump or a metal ball.
19. The semiconductor integrated circuit according to claim 16 , comprising a capacitor.