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Workshop on pcb
This document provides information about printed circuit boards (PCBs) including: - PCBs mechanically support and electrically connect electronic components using conductive tracks etched onto a non-conductive substrate. PCBs can be single layer, double layer, or multi-layer. - Auto-routing is an automated design process where components are automatically routed after placement. Software programs like ISIS and ARES are used for auto-routing. - There are different methods for PCB fabrication including hand/home made, small factories using screen printing processes, and large automated industrial facilities. Basic design considerations include tracks, drills, clearances, and component packages.
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Workshop on pcb
- 1. WORKSHOP ON PRINTEDCIRCUIT BOARD (PCB): CAD DESIGNING AND FABRICATION BASIC Prepared and Presented by: Engr. Mahmudur Rahman Rana Engr. Nasim Ahmed Khan Director Director Adroit Engineer’s Adroit Engineer’s ADROIT ENGINEER'S 1
- 2. PRINTED CIRCUIT BOARD (PCB) Aprinted circuit board (PCB): Mechanically supports and electrically connects electronic components using conductive tracks, pads and other features etched from copper sheets laminated onto a non-conductive substrate. It can be: (1) Single Layer (2) Double layer (3) Multi layer PCB + Electronic component = Printed Circuit Assembly (PCA) ADROIT ENGINEER'S 2
- 3. AUTO-ROUTING Routing: is astep in the design of printed circuit boards (PCBs) and integrated circuits (ICs). Auto- Routing: is an automated design where the components are routed automatically after placing the components . ADROIT ENGINEER'S 3
- 4. ISIS AND ARES (AUTOROUTING) ADROIT ENGINEER'S 4
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- 24. BASIC RULES OFPCB DESIGN Keep Tracks as short as possible Tracks should only have angles of 45 degrees. “Snake” your tracks around the board, Always take your track to the center of the pad Use a single track, not multiple tracks Make sure your tracks go right through the exact center of pads and components make your power tracks as BIG as possible. Keep things symmetrical Don’t leave any unconnected copper fills ADROIT ENGINEER'S 24
- 25. MANUAL vs AUTOROUTING Manual Routing Design Auto Routing Most Difficult Placing the components from schematic Most Complex Easy to design Professional Manually mitrer right angle corners Reliable Unreliable ADROIT ENGINEER'S 25
- 26. MANUALLY PCB DESIGN ForPCB : “You must have……” Software Simulation of design Datasheets of component used Clear Concept about the Circuit ADROIT ENGINEER'S 26
- 27. TO DESIGN APCB Copper Board: (1) Component Side (2) Layer/ Copper Side ADROIT ENGINEER'S 27
- 28. DESIGN PARAMETERS Tracks Drills (1) Drill Hole (2) Drill Solder mark Green Coating and Heat Coating Component Package Clearance ADROIT ENGINEER'S 28
- 29. TRACK According to IPC-2221Formula 1A ; 0.03mm thickness, 0.35 mm trace width , 0.0427 ohm, Vdrop 0.0427 V 1 th (thou/mil) = 0.001 inch = 0.0254 mm ADROIT ENGINEER'S 29
- 30. CLEARANCE IPC 2221B VoltageSpacing 1 to 30 V 0.1 mm 31 to 150 V 0.6 mm 151 to 300 V 1.25 mm 301 to 500 V 2.50 mm ADROIT ENGINEER'S 30
- 31. FABRICATION Fabrication: is theaction or process of manufacturing or inventing something. (1) Hand made/ Home made (2) Industrial (i) Small Factory (Manually) (ii) Large Industry (Automation) ADROIT ENGINEER'S 31
- 32. HAND OR HOMEMADE Components: (i) Copper Clad (ii) Iron (iii)Inkjet Paper (iv)Hand Drill (v) Ferric Chloride ADROIT ENGINEER'S 32
- 33. SMALL FACTORY Screen Print (1)Mash frame (2) Photo-effective (3) Ferric Chloride (4) UV Exposer (5) Print on a copper Clad ADROIT ENGINEER'S 33
- 34. ANY QUESTIONS!! BEST WISHESTO ALL THANKS TO EVERYONE 34ADROIT ENGINEER'S