PCB Files & Manufacturing

4-Layer FR-4 PCB Stackups by Board Thickness

Browse 11 board-thickness options with layer-by-layer reference tables, copper weights and production-confirmation notes.

Updated Oct 17, 2026 · 6 min read

Choose a nominal board thickness below to view one reference construction for a 4-layer FR-4 PCB. The table identifies each copper layer, prepreg and core, from top to bottom.

Most references use 1 oz outer copper and 0.5 oz inner copper. Any different copper weight is stated on the relevant entry. These are reference constructions; the reviewed manufacturing files define the production stackup.

Choose a board thickness

Nominal board thickness Outer / inner copper Reference
0.4 mm 1 / 0.5 oz DIYI-04L-0.4-3313
0.6 mm 1 / 0.5 oz DIYI-04L-0.6-3313
0.8 mm 1 / 0.5 oz DIYI-04L-0.8-3313
1 mm 1 / 0.5 oz DIYI-04L-1-3313
1.2 mm 1 / 0.5 oz DIYI-04L-1.2-3313
1.6 mm 1 / 0.5 oz DIYI-04L-1.6-3313
1.8 mm 1 / 0.5 oz DIYI-04L-1.8-7628
2 mm 1 / 0.5 oz DIYI-04L-2-7628
2.5 mm 1 / 0.5 oz DIYI-04L-2.5-2116
3 mm 1 / 0.5 oz DIYI-04L-3-7628
4 mm 1 / 1 oz DIYI-04L-4-7628C

Click a thickness to open its layer table. Nominal board thickness and the sum of individual reference layers can differ because of construction and finishing. State any required finished thickness and tolerance in PCB Remark for engineering confirmation.

Layer-by-layer reference tables

0.4 mm · DIYI-04L-0.4-3313

Reference: DIYI-04L-0.4-3313
Copper: outer 1 oz; inner 0.5 oz.

Layer Material Thickness (mm)
L1 Outer copper (1 oz) 0.0350
PP 3313 RC57% 4.2mil prepreg 0.0994
L2 Inner copper (0.5 oz) 0.0152
Core FR-4 core 0.1000
L3 Inner copper (0.5 oz) 0.0152
PP 3313 RC57% 4.2mil prepreg 0.0994
L4 Outer copper (1 oz) 0.0350

Reference layer total: 0.3992 mm. This is a layer-table sum, not an additional finished-board tolerance specification.

0.6 mm · DIYI-04L-0.6-3313

Reference: DIYI-04L-0.6-3313
Copper: outer 1 oz; inner 0.5 oz.

Layer Material Thickness (mm)
L1 Outer copper (1 oz) 0.0350
PP 3313 RC57% 4.2mil prepreg 0.0994
L2 Inner copper (0.5 oz) 0.0152
Core FR-4 core 0.3000
L3 Inner copper (0.5 oz) 0.0152
PP 3313 RC57% 4.2mil prepreg 0.0994
L4 Outer copper (1 oz) 0.0350

Reference layer total: 0.5992 mm. This is a layer-table sum, not an additional finished-board tolerance specification.

0.8 mm · DIYI-04L-0.8-3313

Reference: DIYI-04L-0.8-3313
Copper: outer 1 oz; inner 0.5 oz.

Layer Material Thickness (mm)
L1 Outer copper (1 oz) 0.0350
PP 3313 RC57% 4.2mil prepreg 0.0994
L2 Inner copper (0.5 oz) 0.0152
Core FR-4 core 0.5000
L3 Inner copper (0.5 oz) 0.0152
PP 3313 RC57% 4.2mil prepreg 0.0994
L4 Outer copper (1 oz) 0.0350

Reference layer total: 0.7992 mm. This is a layer-table sum, not an additional finished-board tolerance specification.

1 mm · DIYI-04L-1-3313

Reference: DIYI-04L-1-3313
Copper: outer 1 oz; inner 0.5 oz.

Layer Material Thickness (mm)
L1 Outer copper (1 oz) 0.0350
PP 3313 RC57% 4.2mil prepreg 0.0994
L2 Inner copper (0.5 oz) 0.0152
Core FR-4 core 0.7000
L3 Inner copper (0.5 oz) 0.0152
PP 3313 RC57% 4.2mil prepreg 0.0994
L4 Outer copper (1 oz) 0.0350

Reference layer total: 0.9992 mm. This is a layer-table sum, not an additional finished-board tolerance specification.

1.2 mm · DIYI-04L-1.2-3313

Reference: DIYI-04L-1.2-3313
Copper: outer 1 oz; inner 0.5 oz.

Layer Material Thickness (mm)
L1 Outer copper (1 oz) 0.0350
PP 3313 RC57% 4.2mil prepreg 0.0994
L2 Inner copper (0.5 oz) 0.0152
Core FR-4 core 0.8650
L3 Inner copper (0.5 oz) 0.0152
PP 3313 RC57% 4.2mil prepreg 0.0994
L4 Outer copper (1 oz) 0.0350

Reference layer total: 1.1642 mm. This is a layer-table sum, not an additional finished-board tolerance specification.

1.6 mm · DIYI-04L-1.6-3313

Reference: DIYI-04L-1.6-3313
Copper: outer 1 oz; inner 0.5 oz.

Layer Material Thickness (mm)
L1 Outer copper (1 oz) 0.0350
PP 3313 RC57% 4.2mil prepreg 0.0994
L2 Inner copper (0.5 oz) 0.0152
Core FR-4 core 1.2650
L3 Inner copper (0.5 oz) 0.0152
PP 3313 RC57% 4.2mil prepreg 0.0994
L4 Outer copper (1 oz) 0.0350

Reference layer total: 1.5642 mm. This is a layer-table sum, not an additional finished-board tolerance specification.

1.8 mm · DIYI-04L-1.8-7628

Reference: DIYI-04L-1.8-7628
Copper: outer 1 oz; inner 0.5 oz.

Layer Material Thickness (mm)
L1 Outer copper (1 oz) 0.0350
PP 7628 RC49% 8.6mil prepreg 0.2104
L2 Inner copper (0.5 oz) 0.0152
Core FR-4 core 1.2650
L3 Inner copper (0.5 oz) 0.0152
PP 7628 RC49% 8.6mil prepreg 0.2104
L4 Outer copper (1 oz) 0.0350

Reference layer total: 1.7862 mm. This is a layer-table sum, not an additional finished-board tolerance specification.

2 mm · DIYI-04L-2-7628

Reference: DIYI-04L-2-7628
Copper: outer 1 oz; inner 0.5 oz.

Layer Material Thickness (mm)
L1 Outer copper (1 oz) 0.0350
PP 7628 RC49% 8.6mil prepreg 0.2104
L2 Inner copper (0.5 oz) 0.0152
Core FR-4 core 1.4650
L3 Inner copper (0.5 oz) 0.0152
PP 7628 RC49% 8.6mil prepreg 0.2104
L4 Outer copper (1 oz) 0.0350

Reference layer total: 1.9862 mm. This is a layer-table sum, not an additional finished-board tolerance specification.

2.5 mm · DIYI-04L-2.5-2116

Reference: DIYI-04L-2.5-2116
Copper: outer 1 oz; inner 0.5 oz.

Layer Material Thickness (mm)
L1 Outer copper (1 oz) 0.0350
PP 2116 RC54% 4.9mil prepreg 0.1240
PP 7628 RC49% 8.6mil prepreg 0.2180
PP 2116 RC54% 4.9mil prepreg 0.1164
L2 Inner copper (0.5 oz) 0.0152
Core FR-4 core 1.4650
L3 Inner copper (0.5 oz) 0.0152
PP 2116 RC54% 4.9mil prepreg 0.1164
PP 7628 RC49% 8.6mil prepreg 0.2180
PP 2116 RC54% 4.9mil prepreg 0.1240
L4 Outer copper (1 oz) 0.0350

Reference layer total: 2.4822 mm. This is a layer-table sum, not an additional finished-board tolerance specification.

3 mm · DIYI-04L-3-7628

Reference: DIYI-04L-3-7628
Copper: outer 1 oz; inner 0.5 oz.

Layer Material Thickness (mm)
L1 Outer copper (1 oz) 0.0350
PP 7628 RC49% 8.6mil prepreg 0.2180
PP 7628 RC49% 8.6mil prepreg 0.2180
PP 7628 RC49% 8.6mil prepreg 0.2104
L2 Inner copper (0.5 oz) 0.0152
Core FR-4 core 1.6650
L3 Inner copper (0.5 oz) 0.0152
PP 7628 RC49% 8.6mil prepreg 0.2104
PP 7628 RC49% 8.6mil prepreg 0.2180
PP 7628 RC49% 8.6mil prepreg 0.2180
L4 Outer copper (1 oz) 0.0350

Reference layer total: 3.0582 mm. This is a layer-table sum, not an additional finished-board tolerance specification.

4 mm · DIYI-04L-4-7628C

Reference: DIYI-04L-4-7628C
Copper: outer 1 oz; inner 1 oz.

Layer Material Thickness (mm)
L1 Outer copper (1 oz) 0.0350
PP 7628 RC49% 8.6mil prepreg 0.2180
PP 7628 RC49% 8.6mil prepreg 0.2180
Core FR-4 core 0.5500
PP 7628 RC49% 8.6mil prepreg 0.2180
PP 7628 RC49% 8.6mil prepreg 0.2030
L2 Inner copper (1 oz) 0.0300
Core FR-4 core 1.0300
L3 Inner copper (1 oz) 0.0300
PP 7628 RC49% 8.6mil prepreg 0.2030
PP 7628 RC49% 8.6mil prepreg 0.2180
Core FR-4 core 0.5500
PP 7628 RC49% 8.6mil prepreg 0.2180
PP 7628 RC49% 8.6mil prepreg 0.2180
L4 Outer copper (1 oz) 0.0350

Reference layer total: 3.974 mm. This is a layer-table sum, not an additional finished-board tolerance specification.

Use the reference in your order

  1. Match the layer count, nominal board thickness and the outer and inner copper weights to your design.
  2. Enter the DIYIPCB reference name and any required layer order, inner copper weight or thickness tolerance in PCB Remark. Manufacturing instructions must be written in the remark; do not leave them only in PDF or readme files inside the Gerber archive.
  3. For controlled impedance, select the relevant service and enter the impedance targets, corresponding layers or nets, trace widths and spacing in PCB Remark. A reference stackup alone does not request impedance control.
  4. If your required thickness or copper weight is not selectable on the ordering page, request an engineering quotation before placing the order. Special constructions and pricing are confirmed after review.

PCB fabrication and assembly quote · PCB assembly inquiry

Other layer counts and file preparation

Reference data reviewed October 17, 2026. For constructions outside these references, enter your requirements in PCB Remark for engineering review.

Still need help?

Email service@diyipcb.com with your order or request reference and the details of your question.

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