| ??? 12/31/05 16:23 Read: times |
#106281 - Top or botttom Responding to: ???'s previous message |
I am answering Farshid and Kai 1 2here:
My current method is to insert components from the top layer, and solder the pins on bottom layer, as you can see in the pictures. As Kai has said in (1), I also use sockets for ICs, for reusability. I am pondering about the other way of Andy's method: Use bottom layer for signal traces, and top layer for component insertion(including connectors) and Ground plane. I am curious about this: Anyone having any other idea for isolating the ground plane from component pins? The 0.6mm and 1.5mm drilling suggested by Farshid(et al) is okay, but I am having drill bits of order 0.8mm, 1mm, 2mm and bigger. Is there any other way to selectively etch the ground plane layer so that signal pins have a good margin, say above 3mm from ground plane? I have given the screen shots of a dummy circuit, and the top and copper planes as per Andy's technique. Please note that the footprints on the top layer also has pads, I will delete them later. Top layer will look like(pins 4 and 5 of 8pin DIP are grounded, so the thermal relief, but I can go for no thermal relief): 
Bottom layer, which has the signal traces: 
Thank you for your comments, Farshid. Regards, Vignesh PS: Please ignore any mistakes in this post, it took me a long time to write this post! |
| Topic | Author | Date |
| Second layer of PCBs | 01/01/70 00:00 | |
| hmmm | 01/01/70 00:00 | |
| Another idea... | 01/01/70 00:00 | |
| A very good idea! | 01/01/70 00:00 | |
| A clarification | 01/01/70 00:00 | |
| This way? | 01/01/70 00:00 | |
| No problem | 01/01/70 00:00 | |
| better... | 01/01/70 00:00 | |
| That's the solution | 01/01/70 00:00 | |
| Farady Cage ? | 01/01/70 00:00 | |
| Oops! | 01/01/70 00:00 | |
| Single double-sided PCB ! | 01/01/70 00:00 | |
| Depends | 01/01/70 00:00 | |
| Layer | 01/01/70 00:00 | |
| wow 12 replys in 1 hour !// | 01/01/70 00:00 | |
| Yeah! | 01/01/70 00:00 | |
| Close and solid ground plane | 01/01/70 00:00 | |
| Thank you! | 01/01/70 00:00 | |
| Some pics | 01/01/70 00:00 | |
| Your Supply tracks are too thin | 01/01/70 00:00 | |
| Thickness | 01/01/70 00:00 | |
| Decoupling caps? | 01/01/70 00:00 | |
| Top or botttom | 01/01/70 00:00 | |
| Draw it | 01/01/70 00:00 | |
| Ink != Etch resist | 01/01/70 00:00 | |
| Indeed | 01/01/70 00:00 | |
| Time consuming | 01/01/70 00:00 | |
| Special ink | 01/01/70 00:00 | |
| I would... | 01/01/70 00:00 | |
| is it for? | 01/01/70 00:00 | |
| Is because... | 01/01/70 00:00 | |
| Cant get anything better! | 01/01/70 00:00 | |
| It's easy to find all my posts... | 01/01/70 00:00 | |
| DIP => Bottom Routing, Top Plane | 01/01/70 00:00 | |
| Great! | 01/01/70 00:00 | |
| Drilling is easier | 01/01/70 00:00 | |
| Another doubt | 01/01/70 00:00 | |
| Remedies | 01/01/70 00:00 | |
| My idea | 01/01/70 00:00 | |
| Not a good idea for fast digital circuit | 01/01/70 00:00 | |
| Try SMD | 01/01/70 00:00 | |
| A new lowcost direct PCB printer ? | 01/01/70 00:00 | |
| SMD | 01/01/70 00:00 | |
| The key to success is flux | 01/01/70 00:00 | |
| Interesting link | 01/01/70 00:00 | |
| Kai, you are right | 01/01/70 00:00 | |
Highly interesting article! | 01/01/70 00:00 | |
| Soldering | 01/01/70 00:00 | |
| For your views.. | 01/01/70 00:00 | |
| Without schematic... | 01/01/70 00:00 | |
| Schematic | 01/01/70 00:00 |