Hi Alejandro, it may turn out that HASL is not the best choice for this application. With this pitch and lower we love to have a more planar surface. We had enough trouble with 0.8mm pitch and concave termination in the beginning and a lot of pad-tuning had to be done. It turned out that the manufacturer´s recommendations weren´t that bad at all (exept for the excessive length of the pad, must have been for wavesoldering I guess). Don´t think that a stepped stencil is necessary, it would make life more complicated than necessary. Better control the amount of paste with the aperture size. Would be nice to have a test board with different layouts for that purpose, wouldn´t it? Good luck Wolfgang -----Ursprüngliche Nachricht----- Von: Becerra Alejandro [mailto:[log in to unmask]] Gesendet am: Mittwoch, 14. November 2001 15:42 An: [log in to unmask] Betreff: [TN] Resistor Networks of 0.5 mm Pitch Hello to All, we are planning to start using resistor networks of 0.5 mm pitch in a normal reflow soldering process. The boards are FR-4 with HASL coating. Is there any special concern about this component? So far the smallest resistor network that we are using is a 0.8 mm pitch. Within my company it is being recommended a stepped stencil for this component. Is this necessary? Thanks, Alejandro Becerra --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------