AN 114: Board Design Guidelines for Altera® Programmable Device Packages

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ID 683481
Date 4/25/2025
Public
Document Table of Contents
Document Table of Contents x
1. AN 114: Board Design Guidelines for Altera® Programmable Device Packages
1. AN 114: Board Design Guidelines for Altera® Programmable Device Packages x
1.1. Overview of BGA Packages 1.2. PCB Layout Terminology 1.3. PCB Layout for High-Density BGA Packages 1.4. Document Revision History for AN 114: Board Design Guidelines for Altera® Programmable Device Packages
1.2. PCB Layout Terminology x
1.2.1. Escape Routing 1.2.2. Multi-Layer PCBs 1.2.3. Vias 1.2.4. Via Capture Pad 1.2.5. Surface Land Pad 1.2.6. Stringer
1.2.5. Surface Land Pad x
1.2.5.1. Non Solder Mask Defined Pad 1.2.5.2. Solder Mask Defined Pad
1.3. PCB Layout for High-Density BGA Packages x
1.3.1. Surface Land Pad Dimension 1.3.2. Via Capture Pad Layout and Dimension 1.3.3. Signal Line Space and Trace Width 1.3.4. Number of PCB Layers
1.3.4. Number of PCB Layers x
1.3.4.1. Sample PCB Layout for 1.00-mm Flip-Chip BGA and 0.80-mm UBGA (BT Substrate) 1.3.4.2. Sample PCB Routing Scheme on 6 Layers for 0.5-mm 484-pin MBGA 1.3.4.3. Sample PCB Routing Scheme on 3 Layers for 0.5-mm 383-pin MBGA 1.3.4.4. Sample PCB Routing Scheme on 2 Layers for 0.5-mm 153-pin MBGA 1.3.4.5. Sample PCB Routing Scheme on 4 Layers for 0.5-mm 144-pin MBGA 1.3.4.6. Sample PCB Routing Scheme on 2 Layers for 0.5-mm 256-pin and 100-pin MBGAs 1.3.4.7. Sample PCB Routing Scheme on 4 Layers for 0.4-mm 81-pin VBGA (also known as WLCSP) 1.3.4.8. Sample PCB Routing Scheme on 8 Layers for 610-pin VPBGA 1.3.4.9. Sample PCB Routing Scheme on 2 Layers for 0.5-mm 68-pin MBGA 1.3.4.10. Sample PCB Routing Scheme on 2 Layers for 0.4-mm 36-pin VBGA (also known as WLCSP) 1.3.4.11. Sample PCB Routing Scheme on 3 Layers for 0.8-mm 324-pin UBGA 1.3.4.12. Sample PCB Routing Scheme on 3 Layers for 0.8-mm 169-pin UBGA 1.3.4.13. Sample PCB Routing Scheme on 2 Layers for 0.5-mm 301-pin MBGA
1. AN 114: Board Design Guidelines for Altera® Programmable Device Packages

1.2.5.2. Solder Mask Defined Pad

In an SMD pad, the solder mask overlaps the surface land pad’s copper surface. Refer to the Side View of NSMD and SMD Solder Joints figure for the side view of NSMD and SMD land pads. This overlap provides greater adhesion strength between the copper pad and the PCB’s epoxy/glass laminate, which can be important under extreme bending and during accelerated thermal cycling tests. However, the solder mask overlap reduces the amount of copper surface available for the BGA solder ball.

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