The 2026 PCB shortage: what is short, who it hits, and how to design a board that still gets built

A circuit board is copper foil bonded to layers of woven glass cloth soaked in resin. A double-sided board is one such laminate core; a multilayer board stacks cores and prepreg (glass cloth with uncured resin) and puts foil on the outside. All of those materials are short in 2026.

The pull comes from AI servers. One European PCB supplier, Confidee, puts AI accelerator boards at more than 40 to 50 layers, and an analysis by STARTEAM GLOBAL and Würth Elektronik puts AI server boards at three to five times the layer count of conventional designs. Each of those layers uses laminate, prepreg and foil, much of it in premium low-loss grades, and material makers have moved capacity to those grades. The same analysis names copper-clad laminate, copper foil, the thin PP1080 and PP2116 prepregs, high-performance resins and even the tungsten carbide used for drill bits as short.

A war added to it. Reuters reported in April 2026 that PCB prices rose as much as 40% from March to April, citing Goldman Sachs, after an Iranian strike halted SABIC’s production of a high-purity resin used in advanced laminates. Copper foil was up as much as 30% that year, and one Korean board maker’s wait for epoxy resin went from 3 weeks to 15. Copper alone is about 60% of a board’s raw-material cost, according to the Chinese board maker Victory Giant Technology.

The shortage started with advanced laminates. In March 2026 Evertiq reported lead times of up to 140 days for high-Tg, low-Dk materials, while standard FR-4 from two large makers had gone from a usual 3 days to about 4 weeks. By August it had spread to standard FR-4 and thicker laminates. Roughly, as of November 2026:

For a few prototypes of an ordinary board, the shortage has so far shown up as higher prices than a year ago, quotes that are valid for less time and the odd delay, while trade reports say fabs are still accepting orders. JLCPCB, for example, removed in August 2026 the temporary surcharges it had put on large 1-, 2- and 4-layer FR-4 orders during the price swings, saying raw-material conditions had eased, and for about two weeks the same month added roughly five days to standard 6-layer-and-up orders while it expanded its resin-plugging line.

Nothing a designer does will end the shortage: the demand comes from AI server boards, not from prototypes. What you control is how many times you pay for it. A respin is a second order at whatever the price is that week, with a second wait for the fab and the post, and in 2026 both are higher than when you planned the board. The cheapest way through the shortage is to order each board once.

Most second spins come from a handful of mistakes, and each can be caught before the first order:

• A footprint that does not match the part. Check each footprint’s pin numbering against the datasheet; SOT-23 parts in particular come in several pin orders under similar part numbers.
• A missing or wrong connection. Run the electrical rule check on the schematic and the connectivity check on the board, and read every unrouted net by name, not a completion percentage.
• Copper the fab cannot make. Run the design-rule check with your fab’s own clearances, track widths and drill sizes, not the editor’s defaults.
• A power mistake. A regulator held off by its enable pin, a reversed battery connector, a USB-C port without its CC resistors: the copper is fine and the board is dead.
• Files that are not the board you drew. Open the exported Gerber and drill files in a viewer before you upload them; a missing or mirrored layer is cheap to spot there and expensive to spot when the boards arrive.

1. Specify performance, not a brand of laminate. Unless the design needs a particular dielectric constant or loss, ask for the fab’s standard FR-4 and state what matters, such as the glass transition temperature or finished thickness. Confidee’s advice to buyers is the same: approve equivalent laminates and specify attributes, not exact materials.
2. Use the fewest layers the routing needs. A double-sided board is a single laminate core; every extra pair of layers adds prepreg and copper foil, the materials in shortest supply. Do not squeeze a board onto 2 layers that needs a solid ground plane for fast signals or emissions, but do not start at 4 or 6 by habit either.
3. Keep 1.6 mm and 1 oz copper unless the design needs more. Thicker laminates are among the categories under pressure, and copper is most of a board’s raw-material cost. Size the traces for the current they carry with the trace width calculator rather than defaulting to 2 oz.
4. Avoid thin-dielectric stackups you do not need. Controlled-impedance stackups with thin dielectrics use the thin glass styles named as short. A board whose fastest signals are SPI, I²C, UART or full-speed USB does not need one; the fab’s default stackup is fine.
5. Use ordinary drilled vias. Resin-filled via-in-pad and blind or buried vias add process steps and capacity that is in demand. Use via-in-pad only where a part’s pad pitch needs it.
6. Keep the outline small. Board area is laminate. A tighter placement or a narrower board uses less of it on every copy.
7. Quote the alternatives before you commit. Price the board at 2 and at 4 layers, and at standard and premium options, on the fab’s live quote before the layout is frozen, and check the Gerber files so a respin does not cost a second order.

The reports agree that this is not a short squeeze. Confidee calls it structural rather than cyclical and expects it through 2026 and into 2027. The STARTEAM GLOBAL and Würth Elektronik analysis sees no significant easing of glass fabric supply before 2028. NCAB Group’s September 2026 outlook expects things to ease somewhat in the second half of 2027, with meaningful relief perhaps not until mid-2028. Plan for the designs you start this year to be ordered under the same conditions.

PCBEditor holds the fab files back when it finds the mistakes that cost a second order. Design-rule errors stop the Gerber export until you fix them, or until you export anyway with the errors counted and acknowledged. Wiring that would damage parts the moment the board is powered, such as a supply shorted to ground, a diode or protection clamp conducting straight across a rail, or a pin fed a voltage it is not rated for, gets no fab files until you have read each fault and confirmed. Copper that shorts two nets is never exported. Every routing run names each net it could not route, and the board is routed on the number of layers you ask for, so you can try 2 layers before paying for 4.

It does not catch everything, and it is better to know that before you order. In a six-board test of our own, four boards passed every automated check with a circuit mistake still in them; one had the ATtiny85’s I²C clock on PB1, where the chip’s hardware needs PB2, and no rule check can see that because the copper matches the schematic. Read the schematic against each datasheet, then open the files in a Gerber viewer; how to make a PCB walks the whole path from idea to order, checks included.