| ??? 12/31/05 17:17 Read: times |
#106292 - DIP => Bottom Routing, Top Plane Responding to: ???'s previous message |
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 There is no need to drill with a .6mm bit. You just need to isolate the pins of your throught hole devices on the top layer from accidentaly hitting the ground plane.Since you are not making a double sided PCB you are supposed to remove the surronding copper around the hole. 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? Of course, by making a double sided PCB.You'll need to use Toner Transfer for both sides of the PCB.(Like Mr Karas' method) Your CAD ware (FreePCB ?) should be able to draw polygons by itself so there would be no need for you to draw these by hand(and it seems you knew how to use it).A good approach in routing for having a ground plane would be to route every other signal other than GND on a single layer .Then let your your CAD to Autoroute the GND plane for you in the other layer. Please note that the footprints on the top layer also has pads, I will delete them later. There is no need to delete them since they are not connected to anywhere.Your CAD ware would take care of them when it routes the Polygon (Ground Plane). PS: Please ignore any mistakes in this post, it took me a long time to write this post! Do not hurry , Althought everybody like to hear your thoughts soon but it is very hard for you,the questioner (Specially for us as non-english users), to respond rapidly. (Been there ,Done that) Good Luck Farshid |
| 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 |