Pretty advanced looking Soviet flip-chip SMD IC from 1991. - Page 1
Forum section: electronics / general

author: Refrigerator
author_rank: Super Contributor
timestamp: December 24, 2020, 06:55:07 pm
content: Taken from some soviet tech (a TV i think), was originally a SIL package. The substrate is ceramic, after breaking it apart it was pink-ish in color. Backside of the substrate contains what looks like three crystal oscillators. There are SMD devices soldered to what looks like printed traces. The star of the show is the flip chip IC in the middle.Date code says 1991, pretty neat stuff.I captured as much detail as i could with my phone camera. If electronupdate or anyone else wants to take more detailed die shots and maybe analyze the IC i can send it over.Ps: Oh and by advanced i mean the package of the chip. The device itself is probably very simple.

author: daqq
author_rank: Super Contributor
timestamp: December 24, 2020, 10:57:13 pm
content: IBM did it in the 1960s (I'm sure the Soviets did it earlier as well):https://upload.wikimedia.org/wikipedia/commons/8/8d/Modulo_per_computer_tipo_SLT_%28Solid_Logic_Technology%29_-_Museo_scienza_tecnologia_Milano_D1188.jpgIC packaging and hybrid manufacturing is full of weird technologies that seem too advanced for us common folk for the eraInteresting reading:http://smithsonianchips.si.edu/ice/cd/PKG_BK/CHAPT_12.PDF

author: wraper
author_rank: Unknown
timestamp: December 24, 2020, 11:05:46 pm
content: It's audio IF amplifier with demodulator. Those things are ceramic filters.

author: David Hess
author_rank: Super Contributor
timestamp: December 25, 2020, 12:10:13 am
content: And Tektronix was doing it at least by the late 1960s; all of their single package vertical amplifiers use hybrid construction.

author: Refrigerator
author_rank: Super Contributor
timestamp: December 25, 2020, 07:30:43 am
content: Was this common in consumer gear?

author: wraper
author_rank: Unknown
timestamp: December 25, 2020, 11:35:31 am
content: Quote from: Refrigerator on December 25, 2020, 07:30:43 amYes, this particular module was in every 3rd generation Soviet color TV. Some similar stuff was used in other places too. There were k224 series mostly used in tube-semiconductor TVs.http://www.155la3.ru/k224_2.htm

author: schmitt trigger
author_rank: Super Contributor
timestamp: December 25, 2020, 05:27:10 pm
content: And of course, the Japanese were particularly adept in manufacturing hybrid circuits for consumer electronics.A Japanese company stands out: Sanken. Many of its power audio amplifiers are still avidly sought after.

author: Bud
author_rank: Super Contributor
timestamp: December 25, 2020, 05:32:21 pm
content: What the carrier board material is?

author: wraper
author_rank: Unknown
timestamp: December 25, 2020, 05:49:21 pm
content: Quote from: Bud on December 25, 2020, 05:32:21 pmCeramic.

author: Refrigerator
author_rank: Super Contributor
timestamp: December 25, 2020, 06:22:44 pm
content: Quote from: wraper on December 25, 2020, 05:49:21 pmI cracked it apart and it was a pink-ish ceramic so i assume it's not your regular alumina?

author: amyk
author_rank: Super Contributor
timestamp: December 26, 2020, 03:24:25 am
content: Alumina can be slightly pink.

author: babysitter
author_rank: Frequent Contributor
timestamp: December 26, 2020, 01:24:56 pm
content: I know, each forums curse, here is the guy giving warnings:Sometimes its a bad idea to break ceramics. It could be beryllium oxide which is toxic especially by dust inhalation.Its mostly used for ceramic RF transistor packages and other things for its good thermal conductivity.No alarm in this case: There is no pinkish tint to the raw material, normally(tm) parts with BeO must be marked.BRbabysitter

author: daqq
author_rank: Super Contributor
timestamp: December 26, 2020, 04:23:14 pm
content: QuoteIt is true that parts with BeO must be markedthese days. Back in 1991 in barely-post Soviet Russia? Who knows.

author: wraper
author_rank: Unknown
timestamp: December 26, 2020, 04:33:50 pm
content: IMHO it's doped alumina.

author: Bud
author_rank: Super Contributor
timestamp: December 26, 2020, 05:36:53 pm
content: Good old times when people used ceramic substrate for audio IF, what was it, 465kHz or something?

author: Vovk_Z
author_rank: Super Contributor
timestamp: December 27, 2020, 04:00:27 am
content: УПЧЗ-2 is of a 6.5 MHz type.