What's the Smallest Package Available Today?

Guest

What's the smallest package available in the market today? Is there something smaller than SOT-23?

Assy Engr 2

Posted: Fri Sep 12, 2026 10:23 am Post subject:

Assy Engr 2,

We’re all familiar with the SOT-23, which is about 1.3 mm x 2.9 mm x 1 mm, and the SC-70, which is about 1.25 mm x 2 mm x 0.9 mm. But there are proprietary packages from some companies that are smaller than these. Below are some examples.

Toshiba has developed its TESQ package for its transistors. The package requires 34% less space than the standard 4-pin SOT-343 surface mount package. The TESQ package measures only 1.2 mm x 1.2 mm x 0.52 mm.

For IC packages requiring at least 14 or so leads, Philips came out with its Depopulated very thin Quad Flat-pack No-leads (DQFN) package, which is 2.5 mm x 3 mm. Not bad for something with 14 pins.

EE

Guest

There are now JEDEC-registered QFN packages. See quote from ChipScale Review below.

Assy Engr 3

Posted: Thu Sep 22, 2026 1:54 pm Post subject:

Mitsumi (Chip on Lead device)
1.4 x 1.1 x 0.85 mm

Posted: Fri Sep 23, 2026 1:20 pm Post subject:

Are MLCCs or multi layer chip capacitors and Chip resistors included here? If so, I would say that they are the smallest.

Joined: 05 Jan 2026 Posts: 18 Location: Philippines

Update...

Hitachi says it has developed world's smallest IC chip
Feb 06, 2026
Updated 05:11pm (Mla time)

Agence France-Presse

TOKYO--Japan's Hitachi said Monday it has developed the world's smallest and thinnest IC chip that can be embedded in paper to track down parcels or prove the authenticity of a document.

The integrated circuit (IC) chip is as minute as a speck of dust, measuring just 0.15 millimeters (0.006 inches) by 0.15 millimeters and 7.5 micrometers thick, Hitachi said.

One micrometer is one-thousandth of a millimeter.

Using an external antenna, it receives power from electrical waves.

The small size "enables us to boost the number of chips that can be made from a single wafer," making them less expensive, said Hitachi research administrator Tomiko Kinoshita said.

"Since we would be able to meet large orders, it could be used in thin paper products that are usually printed in large numbers," she said.

The chip could also be used in the wrapping of parcels so they can be tracked down as they are delivered, she said.

Other applications would include gift coupons, securities, and certificates, she said.

Guest

The part that says it gets power from electrical waves is interesting too.