purpose of a hybrid? - Page 1
Forum section: electronics / projects

author: SArepairman
author_rank: Frequent Contributor
timestamp: January 09, 2014, 04:20:57 pm
content: What is the point of a hybrid IC? Is it mostly to get rid of the inductive properties of regular packages?I guess I don't understand why its worth to go through all that effort.and I guess thermal matching of resistors since you deposit them, but you don't get that benefit from other components.

author: SeanB
author_rank: Super Contributor
timestamp: January 09, 2014, 04:38:47 pm
content: Hybrid is mostly to have something that is small, compact and easy to make in large numbers, where you need a good matching for all components like resistors and do not want any long term drift that will impair the operation. Also used for harsh environments and where you have large temperature extremes, or where you need a mix of low power precision analogue parts and high power devices in the same package. They are also used for small runs where the requirements are for ultra low drift, low noise and extreme stability with both temperature and time, and where there is no ability to calibrate it in the field. A large number of hybrids are just resistor arrays where you get a very close tracking between the resistors with both applied voltage and with temperature, they track well as the voltage increases so they are used as voltage dividers which show very little drift over a large input voltage range from the desired ratio.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 09, 2014, 04:42:03 pm
content: One significant application area is where multiple laser-trimmed parts are needed - the hybrid can be tested & trimmed on its own, and then becomes a ready-to-use precision component. Thermal matching due to thermal high conductivity of substrate can be an advantage.The mechanical stability of the very rigid material helps avoid drift from parts being flexed if they were on a PCB.Also good where high thermal conductivity is needed.You can also tailor the shape & size of resistors to meet voltage, power and inductance requirements.

author: SArepairman
author_rank: Frequent Contributor
timestamp: January 09, 2014, 04:52:19 pm
content: how much does it typically cost to get a board turned into a hybrid? everyone is just quotes quotes quotes

author: SeanB
author_rank: Super Contributor
timestamp: January 09, 2014, 05:07:19 pm
content: Not cheap. Not even close to cheap. Lowest cost is if a manufacturer has an existing standard single layer substrate and pinout that they make with a conformal coat that they then only have to make a set of screens for conductive ink, resistive ink and then program the laser or abrasive trimming to get it to the desired characteristic. If you have active silicon on there or other silicon diodes, transistors or capacitors then they then are either going to be gold bonded with solder attach, or are going to be screen printed with solder paste, placed and reflowed. If it is a new substrate or if you need multiple layers of ceramic ( you can do a multilayer interconnect like a multilayer PCB) and tracking then you will have a tooling and punch setup as well. At $$$k plus per die punch set ( used to cut the green ceramic sheets) that cost adds up fast.you do it if you are a company like Tek or Fluke and need the advantages of a hybrid, and can amortise the cost over multiple units or have a customer willing to pay.

author: Orpheus
author_rank: Regular Contributor
timestamp: January 09, 2014, 06:20:04 pm
content: Quote from: SeanB on January 09, 2014, 05:07:19 pmAnd "willing" is sometimes a relative term.Using industry standard practices in your dating life can get you in deep trouble.