A sintering fixture that warps ruins the electronic board it supports — flatness is everything in electronic sintering. Graphite fixtures hold the load and spread heat, but only when grade, flatness and support are right. This article covers six points that keep boards flat through sintering.

Jiecheng Graphite (since 2003) machines electronic sintering fixtures to spec, and confirms flatness in writing.

Six points that keep boards flat

Flatness on the support face controls the board. Grade spreads heat evenly and resists temperature. Support spacing prevents sag. Pockets allow for expansion. Surface finish stops sticking. And the inspection report confirms the fixture before it reaches the furnace.

· Flatness held on the support face

· Grade matched to the sintering temperature

· Support spacing sized to the load

· Pockets that allow expansion

· Surface finish that stops sticking

· Per-batch inspection report

Where electronic fixtures are used

Sintering of electronic substrates, ceramic boards and metal pastes all need flat, stable support. The fixture must match your furnace and temperature profile.

· Ceramic and substrate sintering

· Metal-paste and thick-film firing

· Multi-layer board support

· Hot-press and co-firing fixtures

What to specify before you buy

Send the board size, load, temperature and flatness requirement. Jiecheng Graphite machines these fixtures in its 3,000 m² plant and ships worldwide.

Buying checklist

1. Send board size, load and temperature

2. Specify flatness on the support face

3. Confirm grade and expansion design

4. Agree surface finish and inspection

5. Freeze the fixture spec

FAQ

Why is my board warping?

Flatness or support spacing; check both on the fixture.

Can it handle high temperatures?

Yes, with a grade rated for the sintering profile.

How do I stop sticking?

Confirm surface finish and use a release where needed.

Protecting board flatness

Flatness is the number you cannot compromise in electronic sintering. Confirm the support face, the load and the temperature profile before the fixture is machined. Jiecheng Graphite holds the flatness you specify and documents it, so the board stays flat run after run.

· Specify support-face flatness

· Confirm load and temperature

· Document the flatness value

Flat boards come from flat, stable fixtures. Fix flatness, grade, spacing and finish, and the board stays true. Jiecheng Graphite has made sintering fixtures since 2003 and keeps the spec on file.