The Best Way to Protect Sensitive Components in Harsh Environments

Hermetic Laser Sealing is the most durable and cost effective way to protect electronics in the harshest of environments in the most critical of applications: satellite microwave/rf packages, battlefield command and control systems, deep sea sonar and seismic sensors, and medical implants in the human body. The process involves preparing the assembly and then sealing it into a hermetically secure metal package using a computer controlled laser. The process happens in our dedicated ESD space, in our glove box welding systems.

Glove Box System 3
A glove box laser welding system

Application Advantages of Hermetic Laser Sealing

High Reliability – Laser welding provides an exceptionally durable seal, much more so than epoxy, soldering, or mechanical seals.

Won’t Damage Electrical Parts – Laser beam welding has a very narrow heat affected zone, so sealing can be performed in very close proximity to sensitive electrical components.

Oxygen and Moisture Free – Vacuum baked assemblies exhibit less that than 1 ppm (parts per million) oxygen and moisture – this is a level of  performance that conventional epoxy, solder, and mechanical seals cannot possibly match.The overall glove box laser welding environment ensures that assemblies remain free of oxidizing contaminants from start to finish.

Flexibility of Container Material – Because Laser Welding can join dissimilar materials and also crack sensitive materials, engineers have a wide range of material options to use in the packaging of the inner components.

Hermetic Laser Sealing Process

Our base procedure has five stages which insure maximum protection of the assembly and extremely low failure rates:

ESD/FOD Safe Environment – All parts and assemblies are handled in an electrostatic discharge (ESD) and foreign object damage (FOD) safe room to minimize stray electric charges damaging circuitry. Once parts are readied, they are ready to go into our glove box environment.

Vacuum Baking – Assemblies are baked in a computer controlled vacuum oven, resulting in less than 1 ppm of oxygen and moisture.

Controlled Welding Environment – After baking, assemblies are moved into a glove box welding station, which is a controlled gas environment which consists of Argon or Nitrogen. Note that the Vacuum Baking and Welding environment are connected and sealed.

CNC Laser Welding – Assemblies are laser hermetically sealed using a CNC controlled laser. The CNC control makes it possible for us to weld complicated cover shapes with relative ease.

Leak Checking – Hermetically sealed packages are inspected and checked for leaks using Pressure Bombing and Helium mass spectrometers, then carefully packed for shipment.