Eutect's Controlled Laser Soldering Enables Pinpoint Accuracy


Reading time ( words)

Packing densities increase on ever smaller electronic assemblies due to technical requirements and possibilities. Accordingly, the requirements imposed on soldering these components become all the more stringent because, for instance, sensitive components have to be protected from great heat effects. Pinpoint-accurate, fast, and definable soldering is necessary. Therefore, EUTECT GmbH has been using diode lasers for its customized soldering systems for years.

For Matthias Fehrenbach, managing director of EUTECT GmbH, the advantages of laser soldering are clear: "Direct mechanical contact to the soldering point is eliminated during laser soldering, in contrast to other selective soldering methods. That means we can't use other selective soldering methods particularly in confined spaces on the circuit board. Only laser soldering is possible there."

Here, special attention is paid to the laser source. Laser sources are subdivided into various categories; gas, solid, and semiconductor lasers are differentiated. The laser-active medium is important in this connection, since it determines the wavelength as well as the radiation quality. Radiation quality is decisive for the laser's energy density and ability to focus. Medium or low energy densities are needed during laser soldering. In this connection, the solder joints must be efficiently and homogeneously heated without scorching the material. "The solder must absorb laser energy well and convert it into heat. That's the only way we can create a good connection between the surfaces," according to Fehrenbach.

Miniaturization is allowing solder joints are becoming ever smaller. They inhabit ranges from less than 200 μm to a few millimetres. So it’s important that the laser radiation’s focus can be bundled with pinpoint accuracy. “For us, the diode laser has won out in our applications because it offers a series of advantages,” Fehrenbach explains. The diode laser’s output power is thus easy to regulate. The power can be smoothly adjusted into the kilohertz range, whereby the laser can react quickly to energy fluctuations. An additional advantage is radiation focusing, which puts the laser in a position to solder 180 μm solder joints. Focusing with fixed focal width limits energy input locally and with pinpoint accuracy, thereby enabling reduced thermal load on the components in the immediate vicinity.

The temperature-time curve is decisively important during the entire soldering process. The diode laser can be controlled according to a prescribed curve. Among other things, a non-contact temperature-measurement system,which regulates heat input relative to process- and product-specific specifications, can be used for this. The system records all process changes, which are retrievable for quality-assurance measures. Combined with the likewise adjustable wire feed, the customer obtains a system that guarantees reproducible solder quantities and connections.

For over 20 years, soldering and joining systems have been developed, manufactured, installed, and programmed at EUTECT as well as at customers operating worldwide. The Swabian team of experts offers an extensive, constantly evolving module construction kit for process solutions in the field of soldering.

Process-related and commercially optimal modules for the task description will be selected from the selective soldering- and welding-technology process modules and combined into proven stand-alone, revolving, or inline production designs for complete solutions.

The EUTECT module construction kit shows that a slim, individual solution comprising proven building blocks for a customer product’s task description can often be achieved via individual modules or free combinations.

A technologically comprehensive, innovative EUTECT technical centre is available for optimal solution through evaluation or the manufacture of A-B-C prototypes ready for serial production.

Matthias Fehrenbach has officially been a permanent part of the family company’s management since 2010. He moreover leads the development department at EUTECT. 

ABOUT EUTECT

EUTECT GmbH has established itself as a technology leader in special solutions in packaging and connection technology thanks to self-developed solder modules in the field of miniwave and laser soldering and individual machine configurations.

Share

Print


Suggested Items

Reducing Flux Splatter in Sensors and Camera Modules

10/30/2020 | Jasbir Bath, Shantanu Joshi, and Noriyoshi Uchida, Koki Solder America And Koki Company Limited
With the increased use of electronics in new technology areas, flux formulations are being developed to address the new and existing requirements. For sensors and camera modules used for Advanced Driver Assistance System (ADAS) and internet of things (IoT) applications, there is a demand for no-clean flux formulations in lead-free solder paste, which can reduce flux splattering during reflow.

IPC Standards Development: Business Challenges and an Inside View

10/28/2020 | Graham Naisbitt, Gen3 Systems
With increasing frequency, standardising the standards, such as ISO 9201, imposes certain rules that must be met to ensure “fair play” amongst the supply chain. There will be those familiar with hearing about “false positives/negatives” and “never trust the salesman,” so mitigating these is no easy task. However, there is the chance for each 5-30 Task Group to review industry requirements and set out the work program for the ensuing period. With that in mind, much of what follows is based on comments we learn about from our industry around the world, many of whom are not yet IPC members. Yes, this is a membership recruitment drive, unashamedly, as well as a search for volunteers willing to help create the standards of tomorrow.

How to Benefit From Robotic Soldering Processes

10/28/2020 | Pete Starkey, I-Connect007
Webinars are in vogue! But in Pete Starkey's experience, the master of the technical webinar with many years’ experience of delivering first-rate events is Bob Willis—electronics assembly specialist, soldering expert, and provider of training and consultancy in electronics manufacture. Here, Pete recaps Bob’s presentation on the upcoming robotic soldering experience.



Copyright © 2020 I-Connect007. All rights reserved.