The term "castellated" is used to define a physical characteristic of Leadless Chip Carriers. Most LCCs have grooves on the sides of the LCCs, starting at the bottom and located in conjunction with each of the solder pads on the bottom of the component. They typically extend nearly all the way up the side of the component and are typically plated with a solderable metal all or nearly all the way to the top of each groove. When the component is soldered in place, it is desirable to have fillets form from the PCB pad about half way up these "castellations." There are good pictorial representations in the ANSI/J-STD-001B, page 25, Figure 9-10, and IPC-A-610 clause 10.2.4 starting on page 115, including Figures 10-34 through 10-41. Jack 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 >>> <[log in to unmask]> 02/10/98 12:22PM >>> Can someone please give me a definition of "castellated" in regards to Surface Mounted Components. My dictionary just refers to battlements and supporting castles. ################################################################ 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 ################################################################