Let me suggest: IPC-SM-782A "Surface Mount Design and Land Pattern Standard" with amendment 1 Covers land patterns for all types of passives and actives: resistors, capacitors, MELFs, SOTs, SOPs, SOICs, TSOPs, SOJs, QFPs, SQFPs, LCCs, PLCCs, and DIPS. Also included: -Land Patterns for EIA/JEDEC Registered components - Land Patterns for Wave or Reflow soldering - Sophisticated Dimensioning System - Via Location - V-Groove Scroing; 186 pages IPC Member Hard Copy $45; Electronic format, Single User License $160; nonmember prices are higher Related documetns IPC-A-49 "Surface Mount Land Pattern Round Robin Artwork" and IPC-D-275 Design Stgandard for rigid Printed Boards and Rigid Printed Board Assemblies" Order with PO or credit card 847.509.9700 or from our web site http://www.ipc.org Jack Crawford, IPC Project Manger - Assembly 2215 Sanders Road, Northbrook IL 60062-6135 [log in to unmask] http://www.ipc.org 847-509-9700 x 393 fax 847-509-9798 >>> Kicha / Krishna <[log in to unmask]> 02/24/98 08:44AM >>> TechNetters: Hi everyone. I appreciate any help with these following questions. 1. Where can I find specifications for standard surface mount gull wing lead dimensions, such as lead width, the length of the flat portion of the lead that rests on wet paste for say, 50 mil pitch components ? 2. Are there specifications for board pad dimensions to match the component lead dimensions ? If yes, where can I find them ? 3. Are the specifications dependent on which side the components are mounted (top side / bottom side) to account for the extra care needed with regard to surface tension to hold the components on the bottom side during second reflow. Thanks for your time Regards Krishna Kalyan ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################ ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################