Breakthrough welding solutions for hermetic encapsulation
Primoceler – your partner for glass encapsulation GLASS WELDING UNIT ENGINEERING KNOW-HOW � � Laser based welding Solution specification tool and software for � Laboratory & clean room hermetic encapsulation facilities for testing � Installation and training � Tailored solutions for � Technical support and R&D and manufacturing 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 Shear strength comparison 64,0 � Average shear strength ~20 MPa 32,0 � Adhesive (glued) 20 16,0 Shear strength (Mpa) (Welded) � Average shear Shear strength (Mpa) (Glued) MPa 8,0 8 strength ~8 MPa Average Average 4,0 2,0 1,0
Adhesive vs. Primoceler welding Adhesive or frit Primoceler welding UV or high temperature curing No adhesive or other extra materials needed � � necessary � Good long term stability and 100% hermeticity � Extra material needed: Might cause � Small heat affected zone (HAZ) problems due to fumes or particles � Extremely thin welding seam: as thin as 30 µm � Long term stability uncertain in varying possible environmental conditions � Superior bond strength � Problems with hermeticity Highly repeatable process �
Contact for more information � Mr. Ville Hevonkorpi � ville.hevonkorpi@primoceler.com � Mobile +385 40 505 7623
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