Dave, this topic is of great interest to me. I am using Cadence Allegro and recently I started to look into HDI. We do not have demand for via in pad yet,but I tried my design with blind via in pad. The Specctra autorouter would not put microvia in fine pitch pads 20 mils. I am not sure why, there is enough space. I am waiting for Cadence to help me with this problem. So what I am saying is I did not find Cadence to be great for HDI. I would like to hear from other Cadence and other designers as well. Happy Friday Mirka Requesting some feedback from end users - Which toolset is the best for HDI/Microvia design? Thanks, Dave Schaefer Voice: (204)478-8059 Senior PCB Designer FAX: (204)942-3001 Symbol Technologies Email: [log in to unmask] 1000 Waverley Street Winnipeg, MB R3T 0P3 -- | Mirka Halas TSI TelSys Incorporated | | Senior PCB Designer 7100 Columbia Gateway Dr. | | [log in to unmask] Columbia, Maryland 21046 | | http://www.tsi-telsys.com (410) 872-3900: Main | | (410) 872-3922: Direct (410) 872-3901: FAX | -=+=-*********************************************************-=+=- --------------------------------------------------------------------------------- DesignerCouncil 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 DesignerCouncil. To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil 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 ---------------------------------------------------------------------------------