The making of physical contacts between the two layers of a printed-circuit board is generally performed by a chemical process finally resultiong in a plated through hole, which makes the electrical contact and is able to embed the part's pin without need to solder at both sides of the pcb. Fur purposes of repairing a pcb, or to produce one in a diy setting or as a rapid in-house prototype, the traditional hollow rivet is a fair choice, and this is my product to describe and to promote. The tubular hollow rivets need not to be pressed with special equipment, simply, they will be inserted from the upper layer, their heads will be soldered and on the lower side, the rivet's unmodified straight part, part's pin and the soldering point will be connected by the soldering.
A small 'sieve' will make rivets stand in one direction, so you can pick them up onto simple wires to use as inserting instruments. Pre-fabricate a couple of wirs holding about 20 rivets each.
The rivet will be inserted, so the head stands-off 0.5mm from the pcb; 0.6mm soldering wire is used, a toothpick (if good choice, self-standing in the rivet's hole) prevents unwanted filling, and, in the immediate next step while the applied tin is hot, you will push in the rivet to 0.1 mm from the pcb.
After all rivets have been inserted and their heads have been fixed with soldering, the electronical parts will be inserted. On the lower side, pin, rivet and soldering-pad will be amalgamized.
The actual rivets have 1.4 mm heads and an 0.8mm inner diameter so they are suited for IC's and smaller discrete items.
The head of the rivets is designed to be a countersunk screw - this make spilling solder into the hole less probable and makes inserting multipin items easy.
Insert rivet, apply solder and push head down while solder fluid
Wire-bound rivets for convenient application
Linear sieve, shaken rivets will fall into place to be picked onto wire.
|Bezeichnung||Head diameter (mm)||Outer diameter (mm)||Inner diameter (mm)||Length (mm)||Inserting Tool||applicable-to|
|Typ_B||1.4||1.0||0.8||2.3||Linear sieve||IC, small discrete parts|
Material is Copper, tin-plated. International pricing is - without tolls&customs FOB germany - 10 Euro at 700 items and 20 Euro at 2.000 items.
Send orders via email or snailmail to
Ossip Groth Maria Theresia Straße 11 D - 57462 Olpe
Rivets will be available on some countries amazon and ebay systems, soon.
These miniature rivets seem hard to handle. I am glad to show a complete concept which lets you make wires holding rivets to target them to the appropriate pin-holes as convenient as some blind-vias do. The linear sieve component is the key instrument. Only applicable to the actual size rivets, there is a pathc needed for smaller ones, until solved: Take an inscet-sponge from your car's basci equipment, the rivets lie in the bubbles and the bubbles wall holds-against it when you apply force to pick them up.
There is no need to press rivets so they will develop a second head when set in-place. Soldering the rivet as-is is all you need. So, there is no reason to use a quite flat head (which would have a more stable contact area). I decided to make countersunk heads for three reasons: Flat heads are not essential, countersunk heads have a lower risk of beeing filled by solder, and multipin parts will be inserted more easily.
USB-Microcope, Objektive 4x, Upper blue-LED Illumination,, Irfan-View 'Sepia' (Color-Morphing) : the tubular hollow rivet with countersunk head.
To be found by The Engines.