Antenna diaphragm, back shell, terminal and its preparation method and application
A membrane and antenna technology, applied in the field of communication antennas, can solve problems such as the appearance of decorative membranes, save internal space, achieve light and thin, and reduce bad impressions.
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[0121] 3. Preparation method of the first diaphragm
[0122] In the present invention, the first ink layer 13 is formed by spraying (screen printing) the ink composition on one side of the first substrate 11, and then the surface of the first ink layer 13 that needs to form an antenna is sprayed with an energy beam. Irradiation is carried out, and the irradiated product is subjected to electroless metal plating to obtain the first diaphragm 1 with antenna function. Specifically, it can be prepared according to the following steps.
[0123] (1) The powder containing resin, solvent and laser-activatable metal compound is formulated into a coating, sprayed onto one side of the first substrate 11, and cured to obtain the first ink layer 13;
[0124] (2) performing laser activation on the area to be formed with the antenna;
[0125] (3) The antenna layer 12 is formed by electroless plating.
[0126] In step (1), the laser-activatable metal compound can be various laser-activatab...
Embodiment 1
[0181] 1) Preparation of the first diaphragm
[0182] 800g hydroxyacrylic resin (number average molecular weight 3000), 100g laser activatable powder (CuCr 2 o 4 , average particle size 500nm), 100g talcum powder and 20g DISPERBYK-110 and zirconium beads with a diameter of 1.0mm are added in proportion to grinding in a sand mill, and after grinding for 1h, a resin slurry with a fineness of 15μm is obtained; then in the above resin slurry Add 500g methyl isobutyl ketone in three times, keep stirring at a constant speed of 500r / min in the high-speed disperser for 20min; Slowly add butyl ketone into the coating system dropwise within 30 minutes after mixing; finally filter the product in the container with a 120-mesh filter cloth to obtain component A of the coating.
[0183] After mixing 700g Desmodur N3390 and 300g butyl acetate, disperse at a high speed of 500r / min for 10min, during which time slowly add 3g of dibutyltin dilaurate, and filter the resulting liquid with a 120-me...
Embodiment 2
[0205] 1) Preparation of the first diaphragm
[0206] Carry out according to the same method in embodiment 1, difference is, the plastic part after laser etching is immersed in the electroless copper plating solution 0.5 hour, forms the copper layer that thickness is 5 μm, immerses in the chemical nickel solution 10 minutes, outside the copper layer forming a nickel layer with a thickness of 3 μm;
[0207] After electroless plating, the coating and coating were tested for adhesion by cross-hatch method, and the result was 5B.
[0208] 2) Preparation of the second membrane: same as Example 1;
[0209] 3) After the second diaphragm and the first diaphragm are pasted on the inner surface of the mobile phone glass rear shell in sequence by a diaphragm bonding machine, a defoaming process is performed using a defoaming machine to obtain a mobile phone glass rear case A2 with an antenna diaphragm .
[0210] The mobile phone glass rear case A2 prepared above does not affect the ap...
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