Breakthrough welding solutions for hermetic encapsulation - - PowerPoint PPT Presentation

Breakthrough welding solutions for hermetic encapsulation

Primoceler – your partner for glass encapsulation

GLASS WELDING UNIT

• Laser based welding

tool and software for hermetic encapsulation

• Tailored solutions for

R&D and manufacturing ENGINEERING KNOW-HOW

• Solution specification
• Laboratory & clean room

facilities for testing

• Installation and training
• Technical support and

maintenance

Example all in glass encapsulation

• top glass 1mm
• bottom glass 3mm
• no other materials than glass
• welding seam width less than

30 µm

100 x magnification of welding seam 500 x magnification of welding seam

Die shear strength test

Glass-glass shear strength test according to MIL-STD-883, method 2019.7 were performed at Technical Research Center of Finland (VTT) Two different sealing methods were evaluated

Direct glass-glass welding on the Primoceler Felix laser workstation Adhesive bonding with UV cured glue, Vitralit 7256. Often used in glass glass bonding.

Test results

Welded

Average shear strength ~20 MPa

Adhesive (glued)

Average shear strength ~8 MPa

20 8 1,0 2,0 4,0 8,0 16,0 32,0 64,0 MPa

Shear strength comparison

Shear strength (Mpa) (Welded) Shear strength (Mpa) (Glued) Average Average

Adhesive vs. Primoceler welding

Adhesive or frit

• UV or high temperature curing

necessary

• Extra material needed: Might cause

problems due to fumes or particles

• Long term stability uncertain in varying

environmental conditions

• Problems with hermeticity

Primoceler welding

• No adhesive or other extra materials needed
• Good long term stability and 100% hermeticity
• Small heat affected zone (HAZ)
• Extremely thin welding seam: as thin as 30 µm

possible

• Superior bond strength
• Highly repeatable process

Contact for more information

• Mr. Ville Hevonkorpi

ville.hevonkorpi@primoceler.com Mobile +385 40 505 7623