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. Surface Land Pad

Surface land pads are the areas on the PCB to which the BGA solder balls adhere. The size of these pads affects the space available for vias and for escape routing. In general, surface land pads are available in the following two basic designs:

  • Non solder mask defined (NSMD), also known as copper defined
  • Solder mask defined (SMD)

The main differences between the two surface land pad types are the size of the trace and spacing between the trace lines, the type of vias you can use, and the shape of the solder balls after solder reflow.

Figure 2. Side View of NSMD and SMD Land Pads
Figure 3. Side View of NSMD and SMD Solder Joints

Section Content
Non Solder Mask Defined Pad
Solder Mask Defined Pad

Level Two Title