Semiconductor device
View Patent ↗A semiconductor device with a packaging circuit portion connected to a semiconductor chip therein. The semiconductor chip includes a plurality of pad electrodes, and the packaging circuit portion includes wiring connected to the pad electrodes on the semiconductor chip, mounting terminals, and a first signal path for receiving a signal output from the predetermined one of the pad electrodes and transmitting the signal to other one of the pad electrodes. The first signal path includes delay elements comparable to delays in a second signal path extending from the predetermined one of the mounting terminals to the other one of the mounting terminals through the semiconductor chip, and is disposed on a feedback path for phase comparison for synchronizing the phase of an output signal from the second signal path to the phase of an input signal to the second signal path.
1. A semiconductor device with a packaging circuit portion connected to a semiconductor chip, wherein
the semiconductor chip includes a plurality of pad electrodes;
the packaging circuit portion includes:
wiring connected to the pad electrodes on the semiconductor chip;
a plurality of mounting terminals; and
a first signal path for receiving a signal output from a predetermined one of the pad electrodes and transmitting the signal to other one of the pad electrodes;
said semiconductor device includes a second signal path from a predetermined one of the mounting terminals to other one of the mounting terminal via the semiconductor chip, and
the first signal path includes delay elements comparable to a delay in a first portion of the second signal path from the predetermined mounting terminal to one of the pad electrodes for input on the semiconductor chip and a delay in a second portion of the second signal path from one of the pad electrodes for output on the semiconductor chip to other one of the mounting terminals, and is disposed on a feedback path for phase comparison for synchronizing a phase of an output signal from the second signal path to a phase of an input signal to the second signal path, the second signal path extending from the predetermined one of the mounting terminals to the other one of the mounting terminals through the semiconductor chip.
2. The semiconductor device according to claim 1 , wherein the first signal path is a replica circuit simulating a delay element in the first portion and a delay element in the second portion.
3. The semiconductor device according to claim 2 , wherein the semiconductor chip includes a clock synchronization circuit connected to the first portion, the second portion, and the first signal path, respectively; and
the clock synchronization circuit delays the clock signal output from the mounting terminal on the second portion by predetermined cycles with respect to the signal received at the mounting terminal on the first portion, for phase synchronization.
4. The semiconductor device according to claim 3 , wherein the semiconductor chip includes:
a semiconductor substrate;
a plurality of circuit elements, formed on an element formation layer on the semiconductor substrate; and
a plurality of pad electrodes formed on a surface of the element formation layer and connected to predetermined ones of the circuit elements; and
the packaging circuit portion includes a conductive layer connected to the predetermined ones of the pad electrodes and extending on the element formation layer, the mounting terminals are bump electrodes connected to the conductive layer, and the semiconductor device is configured as a flip chip.
5. The semiconductor device according to claim 4 , wherein the first signal path comprises a predetermined conductive layer for connecting the predetermined one of the pad electrodes and the other one of the pad electrodes, and lands for the bump electrodes are formed in parts of the conductive layer.
6. The semiconductor device according to claim 3 , wherein the semiconductor chip includes:
a semiconductor substrate;
a plurality of circuit elements, formed on an element formation layer on the semiconductor substrate; and
a plurality of pad electrodes formed on a surface of the element formation layer and connected to predetermined ones of the circuit elements; and
the packaging circuit portion includes:
a conductive layer connected to the predetermined ones of the pad electrodes and extending on the element formation layer;
bump electrodes formed over the conductive layer;
single-layer or multi-layer wiring and through holes connected to the bump electrodes; and
ball electrodes connected to predetermined ones of the single-layer wiring or the multi-layer wiring, for use as the mounting terminals.
7. The semiconductor device according to claim 6 , wherein the first signal path comprises:
a predetermined conductive layer;
the bump electrodes connected to the predetermined conductive layer; and
the single-layer or multi-layer wiring and the through holes connected to the bump electrodes; and
lands for the ball electrodes are formed in parts of the single-layer or multi-layer wiring.