We are currently experiencing difficulty in locating a production supplier for a copper core board we are using in a newly developed product (estimated usage 250 - 2,500 annually). The past supplier who provided a quality circuit at an economical price has decided to move out of the copper core business as a result of the increase in their telecommunications business for standard product. We located two suppliers who have experience with this technology; however, our cost have increased 4X and the performance to date has been less than satisfactory. Problems to date have revolved around, drilling and routing of the .045 copper plate, selective routing on the top and bottom side of the board to the copper plate, and plating to our specification. Unfortunately, we have opened our tolerances up as much as possible and our new suppliers are still experiencing problems. If you have knowledge of a supplier through experience with this technology or are a supplier, please contact me at the address below. The attached Word file details the requirements of the board. If you would like a .ps or .gbr of the detail drawings let me know. Thanks in advance! Joel W. Maier Senior Buyer HARRIS CORPORATION RF Communications Division 1680 University Avenue Rochester, NY 14610 (716) 242-3148 Fax (716) 242-4767 [log in to unmask]