Tony - As with other surface mount components, I strongly recommend that you don't use solder mask defined pads if at all possible. Ed Valentine Electronics Manufacturing Solutions 8612 Mourning Dove Road, Raleigh, NC 27615 Phone: (919) 270-5145, Fax: (919) 847-9971 Email: [log in to unmask] Website: http://www.ems-consulting.com ----- Original Message ----- From: "Huffman, Tony" <[log in to unmask]> To: <[log in to unmask]> Sent: Friday, September 22, 2000 11:43 AM Subject: [DC] uBGA > Greetings, > I am gearing up for my first BGA design and it is a .8mm pitch uBGA. > Any help for me to find literature on-line that will help me gear up for > this would be appreciated. There are things like Solder Mask Defined pads > vs. Non Solder Mask Defined pads that I am not sure on which way to go. > Thanks in advance. > > > Tony G. Huffman > > PC Board Layout Specialist > > Hunter Engineering Company > > 11250 Hunter Drive > > Bridgeton, Mo. 63044 > > [log in to unmask] > > (314)731-0000 ext.330 > > (314)731-9932 FAX > > http://www.hunter.com > > > >