WWW.PRECIDIP.COM PRECI-DIP DURTAL SA · 2800 DELEMONT · SWITZERLAND PRESS - FIT TECHNOLOGY A cost effective alternative to soldering connectors to a board COMPLIANT PRESS-FIT TECHNOLOGY BASIC TECHNOLOGY COMPLIANT PRESS-FIT TECHNOLOGY BY PRECI-DIP We have been producing contacts, sockets and connectors with press-fit terminations for over ten years. Press-fit technology, which has been around for some 20 years now, is a solderless connection method. It consists of force fitting an oversized contact pin into the plated through hole of a printed circuit board (PCB). The high radial pressure produces a deformation, resulting in a gas-tight electrical connection of high quality. The specific design of our compliant pin is based on a «modified eye of a needle» principle with particular attention paid to geometry, elasticity characteristics, and surface finish. Its main features are : - Elastic deformation over the total range of the hole tolerance; - High retention force, in spite of the low insertion force (much below generally admitted maximum values); - Gas-tight contact zone without any damage (chipping) to hole metallisation; - Low, constant electrical contact resistance; This difference in pin cross section and hole diameter results in a deformation of either the PCB hole or the cross section of the pin during the insertion process of pin into PCB hole. There are two major types of press-fit sections : - Complies with IEC60352-5 standard. They are available for plated hole diameters of 0.6, 0.7, 0.9 and 1.0 mm, according to IEC standards. They are compatible with PCB finishes in tin, copper, or gold on nickel. A solid pin which does not deform in the insertion process (Fig. A) : - With square or hexagonal cross section and point-to-point dimension of the polygon greater than PCB finished hole diameter; - The deformation takes place on the PCB side. A compliant pin which compresses as a result of insertion into the PCB through hole (Fig. B) : Preci-Dip compliant press-fit pin based on a «modified eye of a needle» principle. - With radial elasticity in the contact zone; - The deformation takes place on the contact side. COMPLIANT PRESS-FIT TECHNOLOGY WITH CONNECTING PIN Micrograph cross section of inserted compliant pin. For applications requiring connections on both sides of the PCB, the press-fit termination is extended in the form of an additional contact pin which mates with the female contact of another PCB. This type of contact also has the modified eye of a needle to give superior quality of the press-fit connection. It is presently only available for 1 mm diameter PCB holes. Fig.A: Cross-section solid pin Fig. B: Cross-section compliant pin Over the years, the compliant pin technology for press-fit insertion gained general recognition over the solid pin. Solid press-fit pin Compliant press-fit with connecting pin TECHNICAL SPECIFICATIONS ADVANTAGES OF PRESS-FIT OVER SOLDER-BASED TECHNOLOGY The basic advantages of press-fit technology are obvious, in particular when it comes to adding contacts or connectors to a soldered SMD board: - Efficient, reliable and quick assembly of connectors, without any mounting accessories (screws, brackets, etc.); - No soldering problems (such as thermal load on PCB and components, degassing, hole filling on multilayer, bridging, cold soldering joints...); - No residues on PCB and connector contact area, affecting reliability; - Complete reparability. Connectors can be easily exchanged. Press-fit connections are easily added to an SMD board after reflow soldering of the components, as the hole metallisation is not affected by this process. Technical specification Operating temperature range : - 55 to +125 °C Pin material : Bronze CuSn4Pb4Zn4 (C54400) Pin plating : Tin over Nickel Press-fit characteristic measured acc. to IEC 60352-5 (single pin): Press-in force : 90 N max. (at min. hole diameter) / 65 N typ Push-out force : 30 N min. (at max. hole diameter) / 50 N typ. Push-out 3rd cycle : 20 N min. (at max. hole diameter) PCB hole specifications : Dimensions Nominal hole diameter Diameter finished hole Diameter drilled hole 0.6 mm 0.6 +/- 0.05 mm 0.7 +/- 0.02 mm 0.7 mm 0.7 + 0.07 / - 0.05 mm 0.8 + 0.03 /- 0.02 mm 0.9 mm 0.9 + 0.07 / - 0.05 mm 1.0 + / - 0.02 mm 1.0 mm 1.0 + 0.09 / - 0.06 mm 1.15 +/- 0.025 mm PCB hole specifications : Plating PCB surface finish Tin Copper Gold over nickel Thickness - copper min. 25 µm min. 25 µm min. 25 µm 5 - 15 µm – - Thickness - nickel – – 2.5 - 5 µm Thickness - gold – – 0.05 - 0.2 µm Thickness - tin … FROM OUR CATALOGUE Socket and pin contacts with compliant press-fit terminations are currently available in our catalogue as single contacts and for a multitude of sockets and connectors, in standard or customised versions, such as : ASSEMBLY WITH THE PRINTED CIRCUIT BOARD DIL sockets : Pitch 2.54 mm (Series 146) PGA sockets : Interstitial or 2.54 mm grid (Series 546) PCB connectors : - Sockets : Assembly of press-fit connectors and sockets with the PCB requires only simple tooling which can be installed on a small press: a base plate with holes corresponding to the hole pattern of the PCB and an upper tool (flat rock or with slots to allow for the contact pins in the case of male contacts). Pitch 2 mm , standard or with polarization (Series 831-833) Pitch 2.54 mm with mating pin ø 0.47 mm (Series 346/356 and 801/803) Pitch 2.54 mm with mating pin ø 0.76 mm (Series 801/803) - Pins : Pitch 2.54 mm, connecting pin ø 0.47 mm (Series 356/456 ) Pitch 2.54, connecting pin ø 0.76 mm, standard or shrouded version (Series 800/802/804) You will find all the complementary technical specifications related to the above products in our catalog. More sophisticated equipment (semiautomatic or automatic for volume production) is also available on the market. Press-fit termination are available for a multitude of sockets and connectors. SWISS QUALITY IS NOT A LEGEND Let us prove it ! Many years of experience PRECI-DIP DURTAL SA, established 1976 in Delémont, capital of the Swiss Jura, has long experience in manufacturing screw-machined high precision contacts. Layout: Publicité Rutz | www.pub-rutz.ch A MANUFACTURER CAPABLE OF RESPONDING TO SPECIFIC REQUESTS Delémont (Switzerland) Today we are one of the world leaders in manufacturing contacts and connectors. We offer a broad line of reliable, high quality interconnect components, or customised contacts available in loose conditions or assembled with insulator bodies. Take advantage of our experience in studying and quoting solutions according to your specific requirements. You will be pleasantly surprised by the rapidity of our response. Customer safety We fully guarantee the reliability and the irreproachable performance of our products. To this end, we have chosen a challenging, but efficient way: under the surveillance of a vigilant quality assurance department (ISO 9001: 2000 and ISO 14001), we handle in our own manufacturing plant: - The screw-machining of all parts including possible secondary operations; - The stamping and forming of the clips; - All the electroplating processes and surface treatments; - The production of our range of MIL contacts, including colour code marking, in our own production unit, also certified to MIL-STD 790; - The production of the miniature helical springs with precisely defined characteristics used on our spring loaded contacts; - The injection of the insulator bodies in materials adapted to their application; - All the assembling operations, executed on automatic equipment of our own design. Fully integrated production ... Flexibility, rapidity, know-how Mastering the entire product by an integrated production tool is one of the best trump cards one can have. Most of our special machinery is designed by our own engineering department. We are therefore totally independent from any sub-contractors. Consequently, we will be able to respond to all your enquiries with economically priced solutions, equally for small or high volume batches. In our Delémont manufacturing unit with a surface of 193.500 sq.ft. (certified ISO 9001:2000; MIL-STD-790 and ISO 14001) we produce all the components required for making highly reliable contacts and connectors. Our high speed screw machines produce up to 130 million precision parts per week. With this volume, PRECI-DIP is one of the world leaders in high precision machined contacts. Once screw-machined, the press-fit details are then produced on the home designed multi-station rotary type machines. After machining and plating, the contacts are either shipped in bulk or assembled into sockets and connectors. info and products online : www.precidip.com CONNECT US ! PRECI-DIP Durtal SA Rue Saint-Maurice 34, P.O.Box 341 CH-2800 Delémont / Switzerland Phone: + 41 (0)32 421 04 00 Fax: + 41 (0)32 421 04 01 E-mail: [email protected] Your PRECI-DIP dealer :