Windowpane for vehicles and method for producing same
First Claim
1. A windowpane for vehicles, comprisinga glass sheet,a conductor layer which is formed on a surface of the glass sheet by sintering a silver paste containing a silver powder and a glass frit, said conductor layer comprising at least a strip part and a terminal connection part connected to the strip part, anda connection terminal soldered onto the terminal connection part with a lead-free solder alloy,wherein the conductor layer has a specific resistance at 25°
- C.±
2°
C. of from 2.5 to 6.5 μ
Ω
cm,wherein the strip part has a line width of not more than 0.35 mm, andwherein the lead-free solder alloy consists essentially of tin and silver and has a content of tin of 95% by mass or more, andwherein the windowpane for vehicles is obtained by preheating at about the surface of the conductor layer formed on the glass sheet so as to keep the temperature of the surface of the conductor layer formed on the glass sheet at a temperature of 50°
C. to 210°
C. and not higher than a temperature at which the lead-free solder alloy begins to melt and then performing said soldering.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention is concerned with a windowpane for vehicles including a glass sheet, a conductor layer which is formed on the surface of the glass sheet by sintering a silver paste containing a silver powder and a glass frit and which has at least a strip part and a terminal connection part connected to the strip part, and a connection terminal soldered onto the terminal connection part with a lead-free solder alloy, in which the conductor layer has a specific resistance of from 2.5 to 6.5 μΩcm, the strip part has a line width of not more than 0.35 mm, the lead-free solder alloy consists essentially of tin and silver and has a content of tin of 95% by mass or more, and cracking is not caused on the glass sheet even after elapsing 500 cycles in a prescribed thermal shock test; and a method for producing same.
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Citations
14 Claims
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1. A windowpane for vehicles, comprising
a glass sheet, a conductor layer which is formed on a surface of the glass sheet by sintering a silver paste containing a silver powder and a glass frit, said conductor layer comprising at least a strip part and a terminal connection part connected to the strip part, and a connection terminal soldered onto the terminal connection part with a lead-free solder alloy, wherein the conductor layer has a specific resistance at 25° - C.±
2°
C. of from 2.5 to 6.5 μ
Ω
cm,wherein the strip part has a line width of not more than 0.35 mm, and wherein the lead-free solder alloy consists essentially of tin and silver and has a content of tin of 95% by mass or more, and wherein the windowpane for vehicles is obtained by preheating at about the surface of the conductor layer formed on the glass sheet so as to keep the temperature of the surface of the conductor layer formed on the glass sheet at a temperature of 50°
C. to 210°
C. and not higher than a temperature at which the lead-free solder alloy begins to melt and then performing said soldering. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- C.±
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10. A method for producing a windowpane for vehicles, comprising steps of
printing a silver paste containing a silver powder and a glass frit on a surface of a glass sheet, sintering the silver paste to form a conductor layer, which comprises at least a strip having a line width of not more than 0.35 mm and a terminal connection part connected to the strip part and which has a specific resistance at 25° - C.±
2°
C. of from 2.5 to 6.5μ
Ω
cm,attaching a lead-free solder alloy, which consists essentially of tin and silver and which has a content of tin of 95% by mass or more, to at least a connection terminal, preheating at about the surface of the conductor layer to formed on the glass sheet so as to keep the temperature of the surface of the conductor layer formed on the glass sheet at a temperature of 50°
C. to 210°
C. and not higher than a temperature at which the lead-free solder alloy begins to melt, andconnecting the connection terminal to the terminal connection part with the lead-free solder alloy. - View Dependent Claims (11, 12, 13, 14)
- C.±
Specification