IR reflow soldering
IR infrared “convection” reflow is commonly used in commercial large volume SMD components mounting process. The main differences in reflow soldering processes and oven types lie in heat transfer methods – radiation, conduction, convection, and condensation. In fact, all heat transfers are used in modern reflow ovens. The heat is applied from above, below, or all directions dependent on the equipment being used. In classical infrared “radiation” reflow ovens, several ceramic heaters are transferring the heat to the assemblies, moving through the oven on a conveyor belt, by radiation.
Renesas Electronics Corporation, a premier supplier of advanced semiconductor solutions, and Integrated Device Technology, Inc. (IDT), a leading supplier of analog mixed-signal products, including sensors, connectivity and wireless power, today jointly announced the successful completion of Renesas’ acquisition of IDT, as of March 30, 2019 JST, March 29, 2019 PDT, following approvals by IDT shareholders and the relevant regulatory authorities.
Semicoa has implemented a new ceramic surface mount package for their qualified rectifier diodes from MIL-PRF-19500/477
Semicoa is a supplier that design and development of bipolar power devices for high-reliability military, defense, aerospace, and space applications for 50 years.
Screening activities for space applications require extreme care during the manipulation of the EEE parts to be assembled on a spacecraft. This means that special attention must be paid to avoid damage to the parts, as well as any contamination by foreign materials.
The U.S. Defense Logistics Agency has approved Solid State Devices, Inc.’s 1N5807, 1N5809, and 1N5811, with axial solid silver leaded hermetic packaging, for inclusion on its Qualified Product List (QPL). JAN, JANTX, JANTXV, and JANS screening levels per MIL-PRF-19500/477 are available for these 6 Amps, 50 – 150 Volts power rectifiers.
In modern satellites, the secondary power conditioning unit must supply a wide variety of low voltages, which are required by the payload modules, precisely and without fluctuations even at severe load variations.
It is important to be vigilant in the procurement of electronics components, particularly for space components, because once launched, they cannot be repaired and many spacecraft have intended lives of 14 years and some like Pioneer will continue communicating with Earth for more than 40 years.
The Tin Whisker is a conductive hairy-like crystalline structure of tin that grow spontaneously from a tinned surface, usually as a result of the stress of some sort, and maybe long enough to cause a big problem for those applications demanding a high level of reliability.