As title, I need to create 3 rectangular slotted holes for DC barrel jack on my pcb as the shape of pin holes in the technical drawing of the downloaded files are 3 big rounded pads with holes, but the pins of the actual DC jack are rectangular (Wurth Electronik, DC power jack- right angle). I read the related web article : "How to create slotted holes in pads?" (https://designspark.zendesk.com/hc/en-us/articles/213487549-How-to-create-slotted-holes-in-pads-) and follow the instruction as much as I can:
1. I created a technology file and transfer to my existing pcb file
2. I created a "mechanical layer" for my pcb file
3. I re-sized of the original pads and holes in small
4. I created 3 oval pads in all layers with round holes with proper size in the suitable position
5. I created 3 rectangles with proper size in the mechanical layer and placed it on the oval pads.
All the questions are about "manufacturing plot".
the above captured image is from the preview of mechanical file with mechanical layer
the above captured image is the preview of "board outline file" with board outline layer and mechanical layer
1. My pcb manufactory agency told me that I must put all the slotted holes and holes should be put together in the "keep out layer" (files ???) Which one is the "keep out layer" for DSpcb ?
2. The pads of other SMD are all showed in black colour on the outline and mechanical preview as well as the holes ? Is it normal ? This is my 1st pcb with SMD. I am not sure is it normal when the pads of SMD and pins of other thru' holes device are both in black colour in the "Board outline files " and " Mechanical files".
3. The shape of marks of the rectangular pins/feet of the mentioned DC jack in previews are "oval" but not "rectangle", I guess the mark is the pads but not the rectangalur slotted holes. Is it normal?
4. How can I sure that the slotted hole made by pcb factory will be rectangular one ?