Method and apparatus for circuit design
View Patent ↗A method for designing multi-layer electronic circuits includes defining a plurality of circuit blocks in terms of physical boundaries, the plurality of circuit blocks including a first circuit block with at least one port for connecting to a portion of inter-block routing having conducting material external to the first circuit block. The method further provides protective routing for the at least one port of the first circuit block in a region between the block and the inter-block routing, wherein circuitry within the first circuit connected to the at least one port is not in-circuit with the conducting material of the inter-block routing during processing steps involving the conducting material. The protective routing is a conducting layer which is higher in the multi-layer structure than the highest conducting layer used for routing the net containing the at least one port for inter-block routing. The protective routing also bridges the at least one port to inter-block routing connected to the net in a halo region. Software and/or a computer program product that can be used for multi-layer circuit design is also described.
1. A multi-layer circuit, comprising:
a first circuit block having a first routing layer and a first port connected to the first routing layer;
inter-block routing connecting the first port to a second circuit block of the multi-layer circuit; and
a halo region connecting the first port to the inter-block routing, the halo region having
a second routing layer;
a first interlayer connection connecting the first port to the second routing layer;
a second interlayer connection connecting the second routing layer to the inter-block routing; and
wherein the second routing layer is higher than any routing layer in the first circuit block and the second circuit block that is connected to the first port.
2. The multi-layer circuit of claim 1 , wherein a portion of the second routing layer between the first interlayer connection and the second interlayer connection is isolated from the rest of the second routing layer.
3. The multi-layer circuit of claim 1 , further comprising a bridge between the first interlayer connection and the second interlayer connection.
4. The multi-layer circuit of claim 1 , wherein the first routing layer is on an n th layer of the multi-layer circuit and the second routing layer is higher than the n th layer of the multi-layer circuit, wherein n is an integer number.
5. The multi-layer circuit of claim 4 , wherein the second routing layer is a (n+1) th layer of the multi-layer circuit block.
6. The multi-layer circuit of claim 1 , wherein a highest routing layer connected to the first port in either the first circuit block or the second circuit block is a n th layer of the multi-layer circuit, and the second routing layer is a (n+1) th layer of the multi-layer circuit block, wherein n is an integer number.
7. The multi-layer circuit of claim 1 , wherein the second routing layer is higher than any routing layer in the inter-block routing.