201106583 六、發明說明： 【發明所屬之技術領域】 [0001]本發明涉及一種電磁干擾遮蔽材料以及採用該電磁干擾 遮蔽材料製造的電磁干擾遮蔽殼以及採用該電磁干擾遮 蔽殼的音圈馬達。 [0002] Ο [0003] [0004] Ο [0005] [0006] 【先前技術】 遮蔽（shielding)可以用來控制電場或磁場從空間的一 個區域到另-個區域的傳播，這是克服電_合干擾或 磁場耗合干擾的最有效手段…般地，傳播介質均具有 吸收作用，此吸收作用使得電磁波強度得以衰減，亦即 穿透損失’此衰減遵從指數規律。 目前，很多具有變焦、對焦功能的相機模组採用音圈馬 達來驅動鏡片組移動。音圈馬達因用於擴音器的音圈而 得名，其採用高性能永顧，可實可動線圈的小型化、 輕量化，以及高速啟動、停止等。 相馬達通常具有外殼，該外殼採用金㈣成，可在一 又程度上遮蔽電場，但對磁場的 能有效遮蔽電磁場，造成的電埸 果不 以外的部件的正常工作，夫 迓 ^ 未有政遮蔽音圈馬達之外的電 磁％也會影響其内部的工作。 【發明内容】 有鑒於此，有必要提供 磁干播Mm .«蔽縣較佳的電 擾遮蔽材料、電磁干擾遮蔽殼和音圈馬達。 —種電軒擾《材料，㈣“切料的外殼，該 098126873 表單編號A0101 第3頁/共13頁 0982046049-0 201106583 電磁干擾遮蔽材料具有鎳鐵合金層，該錄鐵合金層的至 少一個表面鍍有金屬膜，該金屬膜是鎳、鐵、銅、鉬的 合金。 [0007] [0008] [0009] [0010] [0011] [0012] 098126873 一種電磁干擾遮蔽殼，其用作音圈馬達的外殼，該電磁 干擾遮蔽殼由電磁干擾遮蔽材料製造，該電磁干擾遮蔽 材料具有鎳鐵合金層，該鎳鐵合金層的至少一個表面鍍 有金屬膜，該金屬膜是鎳、鐵、銅、鉬的合金，該至少 一個鐘有金屬膜的表面為該外殼的内表面或外表面。 一種音圈馬達，其具有電磁干擾遮蔽殼，該電磁干擾遮 蔽殼由電磁干擾遮蔽材料製造，該電磁干擾遮蔽材料具 有錄鐵合金層，該鎮鐵合金層的至少一個表面鑛有金屬 膜，該金屬膜是鎳、鐵、銅、鉬的合金，該至少一個鍍 有金屬膜的表面為該外殼的内表面或外表面。 與現有技術相比，本發明提供的電磁干擾遮蔽材料以及 電磁干擾遮蔽殼能較好地遮蔽音圈馬達内外的電磁場。 【實施方式】 下面將結合附圖對本發明作進一步詳細說明。 請參閱圖1和圖2，本發明實施例提供的一個音圈馬達1， 其電磁干擾遮蔽殼100採用本發明提供的遮蔽電磁干擾遮 蔽材料製成，其具有鎳鐵合金層10以及金屬膜20。 一般地，遮蔽電磁干擾遮蔽材料的導磁率越高，導電率 越高，遮蔽層越厚，則其對電磁波的遮蔽效果越好。 該鎳鐵合金層10由鎳、鐵組成。該金屬膜20是鎳、鐵、 銅、_的合金，其錢於錄鐵合金層10的至少一個表面或 表單編號A0101 第4頁/共13頁 [0013] 201106583 是包覆整個鎳鐵合金層10，其中的鎳、鐵、銅、鉬微粒 可以為納米微粒。該金屬膜2 0既可以位於該電磁干擾遮 蔽殼100的内表面，也可以位於該電磁干擾遮蔽殼100的 外表面。 [0014] 在該金屬膜20中，鎳的含量為 a ，鐵的含量為 Ο ，銅的含量為 bc ，鈿的含量為 d ，則 0.73 < β <0.79 Ο 5優選地， 0.76 ί α ύ 0.78 9 0.17 <0.23 ^優選地7 0.17 <b <0.19 098126873 表單編號A0101 第5頁/共13頁 0982046049-0 201106583 0.02 <c <0.05 ，優選地， 0.03 <c <0.04 y 0.02 <ά< 0.05 ，優選地， 0.02 <d< 0.04 。金屬膜20中的鎳鐵可以增強與鎳鐵合金基體10的浸潤 性，即附著力，銅可增加該金屬膜20的導電率，從而增 強電磁遮蔽功能，而鉬可增加該金屬膜20的機械強度。 [0015] 該金屬膜20的厚度為 h ，其中， lOO^m <h <1000nm ，優選地， 200nm<h < 500nm ο [0016] 該金屬膜20的導磁率大於或等於1 0, 000且小於或等於 800, 000，其最大導磁率，優選地，大於或等於1 00, 000 且小於或等於800, 000。 [0017] 在鎳鐵合金層10中，設鎳的含量為 098126873 表單編號Α0101 第6頁/共13頁 0982046049-0 X 201106583 鐵的含量為 則 0.78 <χ <0.82 優選地 0.79 <χ<0.81 Ο 0.18 <7 <0-22 優選地 0.19 <y < 0.21 [0018] 該鎳鐵合金層10的厚度為 Ο 其中 50μη < t <1000μη 優選地 ΙΟΟμη < t < 500 μη [0019] 該鎳鐵合金層10的導磁率大於或等於4, 000且小於或等於 0982046049-0 098126873 表單編號Α0101 第7頁/共13頁 201106583 500, 000。其最大導磁率，優選地，大於或等於40, 000 且小於或等於400, 000。 [0020] [0021] [0022] 本發明提供的電磁干擾遮蔽殼100能較好地遮蔽電磁場， 尤其適用於遮蔽音圈馬達内的電磁場，以防電磁波影響 音圈馬達外各部件的工作。 【圖式簡單說明】 圖1是本發明的實施例提供的具有電磁干擾遮蔽殼的音圈 馬達的立體結構。 圖2是圖1所示的電磁干擾遮蔽殼所使用的電磁干擾遮蔽 材料的結構示意圖。 【主要元件符號說明】 [0023] 音圈馬達 1 電磁干擾遮蔽殼 100 金屬膜 20 錄鐵合金層 10 098126873 表單編號A0101 第8頁/共13頁 0982046049-0 yBACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic interference shielding material and an electromagnetic interference shielding shell manufactured using the electromagnetic interference shielding material, and a voice coil motor using the electromagnetic interference shielding housing. [0002] [0003] [0006] [Priority] Shearing can be used to control the propagation of an electric field or a magnetic field from one region of another to another region, which is to overcome the electricity _ The most effective means of interference or magnetic field interference interference... Generally, the propagation medium has an absorption effect, which causes the electromagnetic wave intensity to be attenuated, that is, the penetration loss'. This attenuation follows the exponential law. At present, many camera modules with zoom and focus function use voice coil motors to drive lens group movement. The voice coil motor is named for the voice coil used in loudspeakers. It is designed for high performance, miniaturization and weight reduction of real movable coils, and high-speed start and stop. The phase motor usually has a casing, which is made of gold (four), which can shield the electric field to a certain extent, but can effectively shield the electromagnetic field from the magnetic field, resulting in the normal operation of the components other than the electric fruit. The electromagnetic % outside the shadow voice coil motor also affects the internal work. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a magnetic dry broadcast Mm. The better electrical disturbance shielding material, electromagnetic interference shielding shell and voice coil motor of the county. —Electrical symmetry “Material, (4) “Cleaning of the material, 098126873 Form No. A0101 Page 3 of 13 0982046049-0 201106583 The electromagnetic interference shielding material has a nickel-iron alloy layer, at least one surface of which is plated with A metal film which is an alloy of nickel, iron, copper, and molybdenum. [0007] [0012] [0012] 098126873 An electromagnetic interference shielding case used as a casing of a voice coil motor The electromagnetic interference shielding shell is made of an electromagnetic interference shielding material, and the electromagnetic interference shielding material has a nickel-iron alloy layer, and at least one surface of the nickel-iron alloy layer is plated with a metal film, which is an alloy of nickel, iron, copper, and molybdenum. The surface of the at least one clock having a metal film is an inner surface or an outer surface of the outer casing. A voice coil motor having an electromagnetic interference shielding shell, the electromagnetic interference shielding shell being made of an electromagnetic interference shielding material, the electromagnetic interference shielding material having a recording An iron alloy layer having at least one surface of the ferrous alloy layer having a metal film, the metal film being an alloy of nickel, iron, copper, and molybdenum, the at least one metal film coated The surface is the inner surface or the outer surface of the outer casing. Compared with the prior art, the electromagnetic interference shielding material and the electromagnetic interference shielding shell provided by the invention can better shield the electromagnetic field inside and outside the voice coil motor. The present invention will be further described in detail. Referring to FIG. 1 and FIG. 2, a voice coil motor 1 according to an embodiment of the present invention has an electromagnetic interference shielding shell 100 made of a shielding electromagnetic interference shielding material provided by the present invention, which has nickel. The iron alloy layer 10 and the metal film 20. Generally, the higher the magnetic permeability of the shielding electromagnetic interference shielding material, the higher the electrical conductivity, and the thicker the shielding layer, the better the shielding effect on the electromagnetic wave. The nickel-iron alloy layer 10 is made of nickel, The metal film 20 is an alloy of nickel, iron, copper, and _, which is used for at least one surface of the iron-alloy layer 10 or form number A0101. Page 4 of 13 [0013] 201106583 is coated with the entire nickel-iron alloy The layer 10, wherein the nickel, iron, copper, and molybdenum particles may be nanoparticles. The metal film 20 may be located on the inner surface of the electromagnetic interference shielding shell 100, or may be in position. The outer surface of the electromagnetic interference shielding case 100. [0014] In the metal film 20, the content of nickel is a, the content of iron is Ο, the content of copper is bc, and the content of bismuth is d, then 0.73 < β <0.79 Ο 5 Preferably, 0.76 ί α ύ 0.78 9 0.17 < 0.23 ^ preferably 7 0.17 < b < 0.19 098126873 Form No. A0101 Page 5 / Total 13 Page 0992046049-0 201106583 0.02 <c < 0.05, preferably, 0.03 <c < 0.04 y 0.02 < ά < 0.05 , preferably 0.02 < d < 0.04 . The nickel iron in the metal film 20 can enhance the wettability with the nickel-iron alloy substrate 10, that is, the adhesion, the copper can increase the electrical conductivity of the metal film 20, thereby enhancing the electromagnetic shielding function, and the molybdenum can increase the mechanical strength of the metal film 20. . [0015] The thickness of the metal film 20 is h, wherein, 100 μm < h < 1000 nm, preferably, 200 nm < h < 500 nm [0016] The magnetic permeability of the metal film 20 is greater than or equal to 10, 000 and less than or equal to 800,000, its maximum magnetic permeability, preferably greater than or equal to 100,000 and less than or equal to 800,000. [0017] In the nickel-iron alloy layer 10, the content of nickel is set to 098126873. Form No. Α0101 Page 6 / Total 13 pages 0982046049-0 X 201106583 The content of iron is 0.78 < χ < 0.82 Preferably 0.79 < χ < 0.81 Ο 0.18 < 7 < 0-22 is preferably 0.19 < y < 0.21 [0018] The thickness of the ferronickel layer 10 is Ο where 50 μη < t < 1000 μη preferably ΙΟΟμη < t < 500 μη [0019] The nickel-iron alloy layer 10 has a magnetic permeability greater than or equal to 4,000 and less than or equal to 0982046049-0 098126873 Form No. 101 0101 Page 7 / Total 13 pages 201106583 500, 000. Its maximum magnetic permeability, preferably, is greater than or equal to 40,000 and less than or equal to 400,000. [0022] The electromagnetic interference shielding shell 100 provided by the invention can better shield the electromagnetic field, and is particularly suitable for shielding the electromagnetic field in the voice coil motor, so as to prevent electromagnetic waves from affecting the operation of the components outside the voice coil motor. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a three-dimensional structure of a voice coil motor having an electromagnetic interference shielding case according to an embodiment of the present invention. Fig. 2 is a view showing the structure of an electromagnetic interference shielding material used in the electromagnetic interference shielding case shown in Fig. 1. [Main component symbol description] [0023] Voice coil motor 1 Electromagnetic interference shielding case 100 Metal film 20 Recording iron alloy layer 10 098126873 Form No. A0101 Page 8 of 13 0982046049-0 y