List of Standards

List of Standards

The following is a list of most common soldering and mounting standards used and referred by passive component manufacturers in their mounting guide specifications:   EIA/IPC/JEDEC J-STD-002E - Solderability Tests for Component Leads, Terminations, Lugs, Terminals and Wires JESD22-B102E - Solderability IPC/JEDEC J-STD-020E - Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices IPC/JEDEC J-STD-033C- Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive...

Mounting Techniques Overview

Mounting Techniques Overview

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...

Common Soldering Process Issues

Common Soldering Process Issues

Oxidization Fast oxidisation is a common issue related to high temperatures and presence of oxygen during the convection reflow or wave soldering processes. The oxidisation may induce some degradation of metal surface and its environmental robustness, thus impacting the components and the electronic hardware lifetime. The level of oxidisation is depending on more factors, the second most important (after the degree of temperature itself)...

PCB Board Design and Handling

PCB Board Design and Handling

Board Design and Component Pre-Assembly Preparation The leads of leaded components shall be bent and often cut to the right length before they are mounted / soldered to the substrate. Lead cutting, bending and mounting are operations that may be hazardous if they are not performed properly. Fig.10. leaded components basic mounting rules, source: CLR HBK Components mounted to soldering terminals must be provided...

Soldering, PCB Handling and Rework

Soldering, PCB Handling and Rework

Soldering What is the optimum soldering conditions and solder fillet? The best solder fillet for all SMT applications is one which makes a reliable connection and which best withstands the environmental exposures of the products with minimum degradation. This fillet is difficult to describe quantitatively for all parts. The optimum fillet ranges in height from about 1/3 to 2/3 of the part termination height....

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