Circuit module
AssigneeNEC Corporation
InventorHiroaki Ikeda
Life of this patent
Estimating the term…
Abstract
A memory module (10) having a module bus line (15) that can be electrically connected to a main board bus line (22) by a contact terminal (12). Main board bus line (22) can be discontinuous at a module socket. Module bus line (15) can be configured on a front and back side of memory module (10) and electrically connected to the discontinued main board bus line (22) by contact terminals (12) configured on both sides of memory module (10). The front and back side module bus lines (15) can be electrically connected by a module bus through wiring (19′). Characteristic impedance matching between the main board and memory module (10) may be improved.
Claims20
A module provided with a wiring board that supports at least a first integrated circuit (IC) on one side and contact terminals on the one side and an opposite side of the wiring board, comprising:
- a first signal wiring formed on the one side, the first signal wiring electrically connecting a first one of the contact terminals on the one side and a pin of the first IC;
- a first through wiring having a first end connected to the first signal wiring, the through wiring piercing the wiring board near the first IC;
- and
- a second signal wiring formed on the opposite side of the wiring board, the second signal wiring electrically connecting a second end of the first through wiring with a first one of the contact terminals on the opposite side of the wiring board.
A memory module provided with a wiring board having contact terminals on a front side and a back side, the memory module comprising:
- a memory attached to the front side of the wiring board, the memory having a first external terminal;
- a first signal wiring formed on the front side of the wiring board, the first signal wiring electrically connecting a first contact terminal on the front side of the wiring board with the first external terminal;
- a first through wiring piercing the wiring board under the first signal wiring, the first through wiring having a first end connected to the first signal wiring;
- and
- a second signal wiring formed on the back side of the wiring board, the second signal wiring electrically connecting a second end of the first through wiring with a second contact terminal on the back side of the wiring board.
A module provided with a wiring board having front side contact terminals formed on a front side of the wiring board and back side contact terminals formed on a back side of the wiring board, the module comprising:
- a first integrated circuit (IC) attached to the front side of the wiring board, the first IC having a first pin;
- a first wiring formed on the front side of the wiring board, the first wiring provides a signal path in a first direction between a first front side contact terminal and the first pin of the first IC;
- a second wiring formed on the back side of the wiring board, the second signal wiring provides a signal path in the first direction from a first back side contact terminal;
- and
- a first through wiring located away from and in the first direction with respect to the contact terminals, the first through wiring provides a signal path between the first and second wiring.
Dependencies are inferred from the claim text.