When did surface mount resistors first appear ?

Question

I am looking for historical information regarding surface mount resistors and also capacitors and inductors. In particular I would like to know when the first surface mount parts were introduced (which year). I would also like a time-line for each step change in size for basically a year when each SMD resistor size was introduced.

Any suggestions?

Answer 1

When I started in electronics in 1982, SMT resistors and caps were widely available. Perhaps a few of the largest sizes were developed later. We introduced merchant SMT IC packages from about '75 through '85. A few fine pitch/high lead count types are ongoing. Through the 80's and 90's, there were many product announcements of SMT inductors and other components (triac's, etc).



Per Wiki, SMT started with IBM in the '60's. The Saturn V computer it points to had thick film resistors screen on small hybrid modules, typical IBM stuff. So, they were not using chip caps and resistors as of 1964.

http://en.wikipedia.org/wiki/Surface-mount_technology



4 places to look:

1. Check company websites that make SMT components, check their history, ask them for timing info.

2. Standards organizations: EIA/JEDEC and EIAJ (Electronic Industries Association; Joint Electronic Devices Electronic Council; EIA of Japan). These standards committee's define the sizes of components; typically requires 2 - 5 years to standarize after first use. Look up the revision history of the specs, old rev's are probably still available online or from the organizations.



3. Research different SMT devices such as computers, and how they were made. You can look at online museums to see the technologies used. Old periodicals, like Electonic Component News are probably available somewhere. They would have product anouncements.



4. There are some market analysis companies that do market studies. One might give you old studies if you could figure out how to get hold of them.



Good luck!

Answer 2

What you have there's a producer's section variety. with out being able to looking the producer, we are able to purely guess. Is there something printed on the two resistor? 10W = 10 Watts ability score is a robust guess, and sensible for this sort of resistor, the dimensions you unique, and use in a speaker. R7 ought to truly recommend 2 issues: 7 ohms or 0.7ohms (R is often used as a decimal element in resistor values). in case you have get entry to to an ohmmeter, you ought to degree the unbroken one and see if it quite is 3 or 0.3 ohms. yet another hassle is that 7 isn't a properly-known resistor value. it quite is only about quite 6.8, 7.5, 0.sixty 8, or 0.seventy 5 as a substitute. BTW, you wrote 10W4R7 in the identify, yet 10WR7 in the physique of your question. If 10W4R7 is actual and not a typo, then the 4R7 skill 4.7ohms, which *is* a properly-known resistor value. as quickly as you comprehend the flexibility score and resistance for advantageous, you may get a alternative from someplace like digi-key, mouser, and so on. The alternative does not ought to look a similar, only have a similar resistance and a minimum of a similar ability score (extra is positive), so as a substitute of cement (sq.) you should use a ceramic or silicone resistor, which might often be around.

Answer 3

That would involve military applications. That is why you are probably having a hard time getting the information.