John Foster
05-16-2002, 02:11 PM
Hello Tom.
Tom I am extremely cornfused about courtyards. I am looking at
the IPC-SM-782 spec on courtyards. I have also downloaded your
document. Defining a Cad Library. I hope that you can clear it up for me once in for all or point me to some document that explains it. I really wanted to attend your talk at UG conference but my schedule did not allow it. I also saw your talk at Plexus. But guess what I had to go to the bathroom right when you were covering the topic of courtyards. Please let me know the next time you are going to give this presentation somewhere I will sit through the whole thing no matter what. Anyway. As you know I am young in the art. I was directed by our manufacturing engineer to leave .4 millimeters between 1608 [0603] components. So I look at the spec in IPC and they have the courtyard spaced .6 mm on the long side and .3 mm on the short side away from the component. I am looking at Defining a Cad Library and it says that courtyards should never touch. So when you lay down a component, what do you do. Space the courtyards some fixed distance apart and set the body to body clearances at 0 or some other small number. Anyway if you could point me to a document or give me a brief breakdown I would appreciate it.
Thanks
John Foster
Tom I am extremely cornfused about courtyards. I am looking at
the IPC-SM-782 spec on courtyards. I have also downloaded your
document. Defining a Cad Library. I hope that you can clear it up for me once in for all or point me to some document that explains it. I really wanted to attend your talk at UG conference but my schedule did not allow it. I also saw your talk at Plexus. But guess what I had to go to the bathroom right when you were covering the topic of courtyards. Please let me know the next time you are going to give this presentation somewhere I will sit through the whole thing no matter what. Anyway. As you know I am young in the art. I was directed by our manufacturing engineer to leave .4 millimeters between 1608 [0603] components. So I look at the spec in IPC and they have the courtyard spaced .6 mm on the long side and .3 mm on the short side away from the component. I am looking at Defining a Cad Library and it says that courtyards should never touch. So when you lay down a component, what do you do. Space the courtyards some fixed distance apart and set the body to body clearances at 0 or some other small number. Anyway if you could point me to a document or give me a brief breakdown I would appreciate it.
Thanks
John Foster