We always use square pads and for electolytic caps a + sign. Diodes (and Leds) always have symbols on the silkscreen and the cathode is a square pad. Bob Landman H&L ----- Original Message ----- From: Matthias Mansfeld <[log in to unmask]> To: <[log in to unmask]> Sent: July 07, 1999 12:08 PM Subject: [DC] Standard for polarized THT components? > Hello all, > > is there any standard for marking the polarity for THT components, > like electrolytic components, if there is no silk screen with a > thick, white kathode bar? > I know ICs have often round pads, and number 1 is square, but how do > you handle diodes, tantal caps etc.? a small + or - sign in the > copper near the pin, or one pad (which one: 1, 2, +, - ?) square, the > other round? > > Thanx, regards > Matthias Mansfeld > ----------------------------------------------- > Matthias Mansfeld Elektronik > * Printed Circuit Board Design and Assembly > Am Langhoelzl 11, D-85540 Haar, GERMANY > Phone: +49-89-4620 0937, Fax: +49-89-4620 0938 > E-Mail: [log in to unmask] > Internet: http://www.mansfeld-elektronik.de >