1 The Product introduction of Aluminum Drilling Entry Sheet for PCB 
The commonly used aluminum alloy for Aluminum Entry Sheet is 1050/1060/1100/3003/3004/3105/8011, the temper is H18, H19, the common thickness is 0.12-0.25mm, the common width of the sheet is 1244/1245mm etc., and the length is 940/ 1041/1092mm etc, the common width of the coil is about 600mm. The Aluminum Drilling Entry Sheet for PCB  has an excellent thermal conductivity function, can quickly take away the heat generated during drilling, effectively prevent the drill bit from overheating, thereby improving the life of the drill bit and better hole wall condition. At the same time, it prevents instantaneous deformation of the drill bit when it goes down, so that the accuracy of the drilling hole position is kept good, and it prevents burrs from being generated at the hole of the sheet.
 


2 The Product specifications of Aluminum Entry Sheet for PCB Drilling
* Alloy: 1050/1060/1100/3003/3004/3105/8011
* Temper: H18, H19
* Thickness: 0.12~0.25mm
* Width*Length: 790~1300mm or produced by Coiled
* Thickness tolerance (mm): +/-5%
* Width tolerance (mm): +0.5 /-0mm
* Length tolerance (mm): +0.5 /-0mm
* Diagonal tolerance (mm): ≤0.5 mm
* Standing specifications (specification):
1041mm x 1092mm, 940mm x 1244mm, 1041mm x 1244mm, 1092mm x1244mm, etc.
 
3 The product chemical composition and mechanical properties of Aluminum Entry Sheet
for PCB Drilling
1)The Product chemical composition of Aluminum Entry Sheet for PCB Drilling

Alloy	Si	Fe	Cu	Mn	Mg	Cr	Ni	Zn	V	Ti	Zr	Other		AL
												single	total
1050	0.25	0.40	0.05	0.05	0.05	-	-	0.05	0.05	0.03	-	0.03	-	99.50
1060	0.25	0.35	0.05	0.03	0.03	-	-	0.05	0.05	0.03	-	0.03	-	99.60
1100	0.95		0.05~0.20	0.05	-	-	-	0.10	-	-	-	0.05	0.15	99.00
3003	0.6	0.7	0.05 -0.20	1.0 -1.5	-	-	-	0.10	-	-	-	0.05	0.15	Remainder
3004	0.3	0.7	0.25	1.0 -1.5	0.8 -1.3	-	-	0.25	-	-	-	0.05	0.15	Remainder
3105	0.6	0.7	0.3	0.3 -0.8	0.2 -0.8	0.20	-	0.40	-	0.10	-	0.05	0.15	Remainder
8011	0.5 -0.9	0.6 -1.0	0.1	0.2	0.05	0.05	-	0.10	-	0.08	-	0.05	0.15	Remainder

 
2)The Product mechanical properties of 1050 1060 1100 Aluminum Drilling Entry Sheet for PCB 

Alloy	Temper	Thickness (mm)	Mechanical properties
			Tensile Strength（Mpa）	Yield strength （Mpa）	Elongation (%)
			standard value	standard value	A	A50mm
			Not less than
1050	H18	0.12-0.20	140	--	--	--
		0.20-0.25	130	--	--	1
1060	H18	0.12-0.20	140	--	--	--
		0.20-0.25	125	85	--	1
1100	H18	0.12-0.20	140	--	--	--
		0.20-0.25	150	--	--	1

 
3)The Product mechanical properties of 3003 3004 3105 8011 Aluminum Drilling Entry Sheet for PCB 

Alloy	Temper	Thickness (mm)	Mechanical properties
			Tensile Strength（Mpa）	Yield strength （Mpa）	Elongation (%)
			standard value	standard value	A	A50mm
			Not less than
3003	H18	0.12-0.20	190	--	--	1
		0.20-0.25	190	170	--	1
	H19	0.12-0.20	210	--	--	1
		0.20-0.25	210	180	--	1
3004	H18	0.12-0.20	260	--	--	1
		0.20-0.25	260	230	--	1
	H19	0.12-0.20	270	--	--	1
		0.20-0.25	270	240	--	1
3105	H18	0.12-0.20	195	--	--	1
		0.20-0.25	195	180	--	1
	H19	0.12-0.20	215	--	--	1
		0.20-0.25	215	190	--	1
8011	H18	0.12-0.20	160	--	--	--
		0.20-0.25	165	--	--	1
	H19	0.12-0.20	170	--	--	--
		0.20-0.25	175	--	--	1

 


4 The Product features of Aluminum Drilling Entry Sheet for PCB 

1) The Aluminum Entry Sheet for PCB Drilling has excellent thermal conductivity and large thermal conductivity, which can quickly dissipate the heat generated by friction when the drill is drilled at high speed, reduce the drilling temperature, and effectively prevent the drill from overheating, thereby increasing the life of the drill and better Hole wall condition;
2) The Aluminum Drilling Entry Sheet for PCB  has a certain rigidity to prevent the sheet from shaking when the drill is lifted, and it has a certain degree of elasticity. When the drill bit is drilled, it is immediately deformed when it touches, ensuring the accuracy of the drilling hole;
3) The Aluminum Drilling Entry Sheet for PCB  has a certain hardness to prevent burrs on the upper surface of the drilling;
4) The surface of the Aluminum Entry Sheet for PCB Drilling is flat and clean, without wrinkles, black spots and other appearance defects, ensuring the quality of drilling;
5) The Aluminum Drilling Entry Sheet for PCB  effectively prevents the drill tip from producing indentations and scratches on the surface of the copper clad laminate during processing;
6) The Aluminum Drilling Entry Sheet for PCB  can provide positioning and guiding function during the downward process of the drill, and improve the positioning accuracy of the drilling.
 
5 The Application of Aluminum Entry Sheet for PCB Drilling

Aluminum Drilling Entry Sheet for PCB  is widely used in ordinary circuit board drilling or more demanding circuit board drilling.