| ??? 11/07/05 18:36 Read: times |
#103388 - what you have done ... Responding to: ???'s previous message |
Suresh R said:
can you tell me how to make a solid ground plane in two layer board design.
what i have done is " connected the bottom layer copper pour to the ground net. no copper pour in the top layer." Do the copper pours LAST. Connect all signals and power traces. Try to keep them all on the top layer, but you may use the bottom layer for convenience. For best signal integrity, don't run traces on the top layer parallel with any traces on the bottom layer. In fact, if at all possible, avoid running any top-layer traces over or across any bottom-layer traces -- you want the traces to be over a continuous plane. When all signal and power traces are routed, pour the bottom-layer ground plane. Then pour a top-layer ground plane around all of the traces and components on the top layer. (Make sure to set your clearances appropriately.) The ground plane on the top layer should connect to all of the components on the top that have ground nodes (make sure to use thermal relief pads!). Finally, stitch the two ground planes together using lots of vias. The ground track and Vcc track runs on both sides of the board I'm not sure what you mean by this. There shouldn't be a ground "track" (meaning trace?) on either layer. -a |
| Topic | Author | Date |
| two layer PCB | 01/01/70 00:00 | |
| +5VDC also drives PhotoMOS relays | 01/01/70 00:00 | |
| Solid ground plane is needed! | 01/01/70 00:00 | |
| what i have done is | 01/01/70 00:00 | |
| what you have done ... | 01/01/70 00:00 | |
| Thermal relief's | 01/01/70 00:00 | |
| You need a solid ground plane | 01/01/70 00:00 | |
| I want the best money can buy, but do no | 01/01/70 00:00 | |
| Thermal relief in PCB's | 01/01/70 00:00 | |
| An illustration... | 01/01/70 00:00 | |
| went through the design but | 01/01/70 00:00 | |
| Thermal reliefs were demonstrated | 01/01/70 00:00 | |
who are you posting to???? | 01/01/70 00:00 | |
| thermal reliefs only ease soldering | 01/01/70 00:00 | |
| Resistance calculation for thrmal relief | 01/01/70 00:00 | |
| you better read ..... | 01/01/70 00:00 |