What happens if you use too much solder?

What happens if you use too much solder?

Too Much Solder It is entirely possible that this blob of solder wets neither the pin nor the pad and is not a reliable electrical connection. The best evidence of proper wetting (and good electrical contact) is a nice concave surface as on the joint on the far left.

How do you prevent solder splash?

Reducing the amount of flux sprayed onto the board, or increasing the pre-heat to drive off the flux’s solvent would eliminate this cause. If the pallets are too cood when passing through the wave, there could be a splash. Reducing the conveyor speed or increasing pre-heat settings (or both) could help.

How is the height of a solder joint determined?

The solder joint height (or standoff) was determined in two ways: 1) cross-section, and 2) z-microscope measurement at all four corners and the center of the component. For the BGA case, 50 units from 28 lots of material on 13 different components were characterized. The average solder joint height was 0.145mm ( FIGURE 8 ).

How tall is solder paste before and after heating?

Standard (typical) stencil is of 127 um height. 2) Height of solder paste after application of a stencil (before heating) cannot be greater than height of stencil. My comment: I don’t remember for sure, but I think they meant, that average height of solder paste is equal (not just not greater) to height of stencil.

Why is wave height control important in wave soldering?

Precise control of the wave soldering condition is required for difficult soldering of the PWB with high heat capacity, which requires improved skills of the engineer controlling the process because it is difficult to measure the wave shape quantitatively in the production line.

Where does the solder go during reflow soldering?

My current understanding is that during reflow soldering nearly all solder fillet is extruded from beneath the component (to the so-called areas of toe, heel and sides), video link. However, there are several hundreds (or maybe tens) microns of solder left beneath the component.