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tempered glass which is not feasible with conventional techniques (Fig. 6). Conventional methods induce stress to the substrate which results in breakage of the glass. Tests demonstrated that the breaking strength of glass with laser drilled holes is higher than glass with mechanical drilled holes. Figure 7 shows the breaking strength of laser and mechanically drilled glass in comparison to undrilled float glass.


Customer needs


4JET’s laser drilling systems are custom configurable as stand-alone system or available as sub-module of 4JET’s thin film processing line. The stand alone system can be easily integrated into a production line and equipped with or without conveyer belt. The drilling system is provided with user friendly software which enables programming of different hole geometries by the user. The system can be configured to the client needs.


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Table 1: process parameters for 3mm float glass Glass thickness [mm] Hole diameter [mm] Process time [s]


3 3


3.5


3 5 5


3


10 12


Fig. 7: breaking strength of drilled in comparison to undrilled glass, 100mm x 100mm x 3mm float glass, 5mm hole diameter


Make hay while the sun shines...


Do you know if your solar application is reaping what it should? Already Carlo Gavazzi’s Eos Array product range is monitoring the equivalent installed power of 800 MWp; 10000 string boxes and 900 running installations.


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www.solar-pv-management.com Issue II 2011


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