1249469 九、發明說明： 【發明所屬之技術領域】 ，本發明猶_-猶電磁紐料，_是__麵驗相位 相消原理所形成之電磁波吸收薄膜結構及其製造方法。 【先前技術】 ^ 隨著電腦、通訊、消費性電腦產品功能不斷的増加及數位化、高 . 匕、普及化，人體暴露在高能量電磁㈣機會越來越多，造成人體 健康上的危害，增加了白血病、腦瘤、驗破壞...等罹患機率。根據研 • 究指出’當電磁波超過60赫兹，對人體的細胞DNA結構會造成傷* ; =在-麵外的研究報告中更·，行動電話會對人賴 暫4失去讀、行為能力降鮮影響，正@為電磁波的貞面影響不斷 地被發掘，因此，抗電磁波的材料已成為各方的研究重點。 -般抗電魏材之結構可大略㈣電場遮_與磁場遮蔽材兩大 類。另外目前還有-種採用特殊金屬纖維與其它纖維混紡、織造而成 =抗EMI功能性織物，或者有的則以有機複合材料，應用高分子渗布 處理技術’以外表塗絲改變各種㈣包括五金、瓣、鎂、欽、銘 。金及木材、喊等材料喊面雛來達到抗電磁波的功能。 籲；的各種抗電财裝4都是厚度大的結構，目而限定其 -&圍’尤,、疋應關來越講就輕薄短小的電子產品，例如手機上。 • , 電磁波裝置雖號稱其遮蔽效果很好，但是實際上這些 、，^電财裝置仍會從其親發發射大部分的電磁波。 麵«紗法， 【發明内容】 方法本要目的’在於提供一種電磁波吸收薄膜結構及其製造 薄膜結^内。的相位相消特性，來達到將電磁波抵銷、吸收於該 方法本另一目的’在於提供一種電磁波吸收薄膜結構及其製造 八月匕以層數更少、厚度更薄的薄膜結構，即可獲得優良的電 5 1249469 磁波阻隔效果。 本發明之另一目的，在於提供一種電磁波吸收薄膜結構及其製造 方法，其中本發明所製得之電磁波吸收薄膜結構不需額外的接地步驟。 為達以上之目的，本發明提供一種電磁波吸收薄膜結構，其包含 有 複合層，其係内混合有數個粒子，且該複合層的厚度為所欲吸 收之電磁波波長的%整數倍；以及_反射層，其餘於該複合層之一 側面上，且該反射層之折射率大於該複合層之折射率。 本發明尚提供一種製作上述之電磁波吸收薄膜結構的方法，其包 括下例步驟提供一高分子聚合物溶液；於該高分子聚合物溶液中混入 粒子，進行一成型製程，以使該高分子聚合物溶液形成聚合薄膜，其 ，，一個聚合薄膜的厚度為所欲吸收之電磁波波長乂整數倍；以及於 該高分子聚合物薄膜之一側面上形成一折射率大於該複合層之折射率 的反射層。 兹為使貴審查委員對本發明之結構特徵及所達成之功效更有進 步之瞭解與認識，謹佐以較佳之實施例圖及配合詳細之說明，說明 如後： 【實施方式】 本發明為一種電磁波吸收薄膜結構及其製造方法，其係藉由波相 消干涉原理來達到將電磁波相消，以達到將電磁波吸收之目的。 首先’先針對相消干涉（destructive interference)的原理先 進行說明，所謂相消干涉係當兩列同源反向的波相遇，一列的波峰會 疊加在另一列波的波谷上，使兩個波互相抵消，以下本發明將以此一 原理為基礎，進行本發明的說明。 請參閱第1圖，其係本發明之一實施例示意圖，其中為便於瞭解本 發明之電磁波吸收薄膜結構與欲屏蔽物間的位置關係，係於圖中繪示 出欲屏蔽物6。本發明主要包含有一以高分子聚合物為载體12而混入適 當粒子14的複合層1與一位於複合層1上的反射層2。其中對於複合層工 的厚度為滿足波的相消干涉原理，乃採為所欲吸收之電磁波波長的乂n 倍’其中η為自然數，以使射入複合層丨的波於遇到阻礙物時折射回來1249469 IX. Description of the invention: [Technical field to which the invention pertains], the invention is an electromagnetic wave absorbing film structure formed by the principle of phase cancellation, and a manufacturing method thereof. [Prior Art] ^ With the continuous increase in the functions of computers, communication and consumer computer products, digitalization, high-grade, popularization, human exposure to high-energy electromagnetic (four) opportunities are increasing, causing harm to human health, Increased the risk of leukemia, brain tumors, test damage, etc. According to the research, it is pointed out that 'when the electromagnetic wave exceeds 60 Hz, it will cause damage to the DNA structure of the human body. * In the research report outside the field, the mobile phone will lose the reading and behavior ability. Influence, Zheng @ is constantly being discovered for the influence of electromagnetic waves. Therefore, materials resistant to electromagnetic waves have become the focus of research. - The structure of the general anti-electric Weishi material can be roughly (4) electric field shielding _ and magnetic field shielding materials. In addition, there are also kinds of special metal fibers mixed with other fibers, woven into = EMI-resistant fabrics, or some with organic composite materials, the application of polymer bleed processing technology Hardware, petals, magnesium, Chin, Ming. Gold and wood, shouting and other materials shouted to achieve anti-electromagnetic function. The various anti-electricity packs 4 are all thick in structure, and the purpose is to limit their -& circumference, especially to the lighter and shorter electronic products, such as mobile phones. • Although the electromagnetic wave device claims to have a good shielding effect, in fact, these electric devices will still emit most of the electromagnetic waves from their own. The present invention is directed to providing an electromagnetic wave absorbing film structure and a film structure therefor. Phase cancellation characteristic to achieve electromagnetic wave offset and absorption in the method. Another object of the present invention is to provide an electromagnetic wave absorbing film structure and a film structure having fewer layers and a thinner thickness in August. Get excellent electrical 5 1249469 magnetic wave blocking effect. Another object of the present invention is to provide an electromagnetic wave absorbing film structure and a method of manufacturing the same, wherein the electromagnetic wave absorbing film structure produced by the present invention does not require an additional grounding step. In order to achieve the above object, the present invention provides an electromagnetic wave absorbing film structure comprising a composite layer in which a plurality of particles are mixed, and the thickness of the composite layer is an integer multiple of a wavelength of an electromagnetic wave to be absorbed; and _reflection The layer is on the side of one of the composite layers, and the refractive index of the reflective layer is greater than the refractive index of the composite layer. The present invention further provides a method for fabricating the above-mentioned electromagnetic wave absorbing film structure, which comprises the steps of providing a polymer solution in the following step; mixing particles into the polymer solution, and performing a molding process to polymerize the polymer The solution forms a polymeric film, wherein the thickness of a polymeric film is an integer multiple of the wavelength of the electromagnetic wave to be absorbed; and a reflection having a refractive index greater than the refractive index of the composite layer is formed on one side of the polymeric film Floor. In order to make the reviewer's understanding of the structural features and the efficacies of the present invention more advanced, the following description of the preferred embodiment and the detailed description will be given as follows: [Embodiment] The present invention is a The structure of the electromagnetic wave absorbing film and the manufacturing method thereof are achieved by the principle of wave destructive interference to cancel the electromagnetic wave to achieve the purpose of absorbing the electromagnetic wave. First, let's first explain the principle of destructive interference. The so-called destructive interference system is when two columns of homologous reverse waves meet, and the peaks of one column are superimposed on the troughs of another column, so that two waves The present invention will be described below on the basis of this principle. Referring to Fig. 1, which is a schematic view of an embodiment of the present invention, in order to facilitate understanding of the positional relationship between the structure of the electromagnetic wave absorbing film of the present invention and the object to be shielded, the shield 6 is shown in the drawing. The present invention mainly comprises a composite layer 1 in which a suitable polymer 14 is mixed with a high molecular polymer as a carrier 12 and a reflective layer 2 on the composite layer 1. The thickness of the composite layer is the principle of the destructive interference satisfying the wave, which is 乂n times the wavelength of the electromagnetic wave to be absorbed, where η is a natural number, so that the wave injected into the composite layer encounters an obstacle. Refraction back
1249469 的波行進路程恰為波長的% n倍，當路程差恰為波長的% n倍時，波 峰會疊加在另一列波的波谷上，使兩個波互相完全抵消。 接續，針對上述本發明所混入粒子進行舉例說明，首先該粒子14 可以為反射粒子16，而反射粒子16更可為具有雙層結構反射粒子18， 其内層182為吸波材質，如碳化矽、麥飯石、遠紅外陶瓷、電氣石等， 而外層184為反射材質，如金屬。請參閱第2圖，當電磁波射入之波行 - 進方向遇到反射粒子18時，較低能量的波將被反射粒子18的外層184反 . 射，但反射的波，將遭遇到另一反射粒子18，如此不斷重複，而產生 如消波堤的效果，使電磁波抵銷；而穿射入反射粒子18内的電磁波將 # 部分被内層182吸收，而剩餘穿透出的電磁波其能量將大幅度衰減，並 在穿透内層182後面臨外層184的折射，如此在反射粒子18内部不斷折 射、相消、吸收，而將電磁波抵銷。 本發明之反射粒子16也可採部分反射粒子為具有雙層結構之反射 粒子18，部分粒子為單層結構之反射粒子16混合僅利用吸波材所構成 之較小吸收粒子21混入高分子載體12内，以使高分子内的粒子分佈更 為緊密’而形成如同蜂窩狀的複合層1，如此能更增加波於複合層^内 折射、相消、吸收，如第3圖所示，此種方法，可避免高混合比例情況 下，反射粒子16可能產生導通的問題。 鲁請參閱第4圖，更者，本發明之吸收粒子21也可以為具有雙層結構 的吸收粒子22，也就是内層222為反射材質，如金屬，而外層224為吸 一 〗 波材質，如碳化矽、麥飯石、遠紅外陶瓷、電氣石等。當電磁波遇到 ， 此一雙層結構之吸收粒子22時，電磁波將先遭遇吸收，而通過外層的 電磁波將遭遇到内層反射回外層吸收層，而大幅度降低電磁波的能 量，甚至達到將電磁波完全吸收。 當然，上述所提過之各種粒子，可以適當單獨使用或者混合，以 達到較佳吸收、抵銷電磁波。 接續’將對本發明之反射層2進行說明，本發明之反射層2係位於 複合層1上，該反射層2係用以將能夠穿越複合層丨之電磁波反射回複合 層1，因此，該反射層2之材料選用係依據複合層1之載體12來進行選 7 擇’使反射層2之折射率出大於載體12之折射率η2，以使電磁波由密介 質射向疏介質，以在符合布魯斯特角（Brewsten angle)條件下，又 幅度增加電磁波反射回複合層丨的機會。一般而言，係採用_合金層來 形成折射層2，也可是由铭層、鎳層、鐵層、銅層以及始層所組成之堆 疊層；而當選定為合金層時其合金類別可選自、錄、鐵、始、鋼所 組成，另外也可添加微量的錳。 以下，將對本發明之製造方法進行說明，請參閱第5圖，首先，如 步驟si所述提供一熔融態之高分子聚合物以作為載體12;接著，如步 驟S2所述，於載體12中混入前述之粒子，其中混入的粒子選擇，可依 據前述所提過之反射粒子、吸收粒子、雙層反射粒子、雙層吸收粒子 進行單獨或混合選擇：再如步驟S3所示，進行_製程，以使載體 12成為複合層1 ,其中該成型製程時可藉由擠製過程將複合層丨之臈厚 形成所需厚度；最後，如步驟S4所示，於複合層1表面形成一反射層2， 該反射層2的形成方法可選自於真空濺鑛（vacuumSpUuer)、電錄等。 更者，為便於本發明之吸收電磁波薄膜的應用，更可於複合層丨之另一 側面進行一上膠步驟，以形成一可供黏貼的膠層24，如步驟S5所示， 或者是於反射層2之另一側面上膠（其上膠位置的不同乃視欲黏貼位置 不同而有差異），以便於使用者將本發明黏貼於所欲進行電磁波阻擋的 位置，其中於反射層2之另一側面上膠時，需先於反射層2之該側面上 形成一絕緣層26，以避免電流導通，其成品如第1圖所示。 接續，將對本發明之應用在如手機等電磁波通訊器材上的實施例 進行說明，首先請參閱第6圖所示，就應用在天線上來進行說明，手機 藉由電磁波發射器與天線將電磁波訊號發射給基地台，因此天線往往 是電磁波發出的位置，對於人體的影響也往往更為顯著。本發明係針 對此一問題，於天線外黏貼本發明之吸收電磁波薄膜，此一黏貼方式， 如第6圖所示，係將天線3與螺固元件4外圍皆形成或者黏貼上本發明之 吸收薄膜5,但需保留一寬度” a”無黏貼或者形成本發明之吸收薄膜 以供電磁波穿射出，該a寬度為手機發射之電磁波的波長的整數倍，且 此一寬度a係朝向遠離人體接觸面的方向。更者，也可如第7圖所示，The wave travel of 1249469 is exactly n times the wavelength. When the path difference is exactly n times the wavelength, the wave peak is superimposed on the valley of the other wave, so that the two waves cancel each other completely. Next, for the above-mentioned mixed particles of the present invention, first, the particles 14 may be reflective particles 16, and the reflective particles 16 may be two-layered reflective particles 18, and the inner layer 182 is a absorbing material such as tantalum carbide. Medical stone, far-infrared ceramics, tourmaline, etc., while outer layer 184 is a reflective material, such as metal. Referring to Fig. 2, when the wave-in direction of the electromagnetic wave encounters the reflected particle 18, the lower energy wave will be reflected by the outer layer 184 of the reflective particle 18, but the reflected wave will encounter another reflective particle. 18, so repeated, such as the effect of the breakwater, the electromagnetic wave is offset; and the electromagnetic wave that is incident into the reflective particle 18 is partially absorbed by the inner layer 182, and the remaining electromagnetic waves are greatly increased in energy. It attenuates and faces the refraction of the outer layer 184 after penetrating the inner layer 182, thus continuously refracting, canceling, and absorbing inside the reflective particles 18, thereby offsetting the electromagnetic waves. The reflective particles 16 of the present invention may also be a partially reflective particle as a reflective particle 18 having a two-layer structure, and a partial particle having a single-layer structure of the reflective particle 16 mixed with only the smaller absorbing particle 21 composed of the absorbing material and mixed into the polymer carrier. In 12, the composite layer 1 is formed in a honeycomb shape so that the particles in the polymer are more closely distributed, so that the refraction, cancellation, and absorption in the composite layer can be further increased, as shown in FIG. In this way, the problem that the reflective particles 16 may be turned on in the case of a high mixing ratio can be avoided. Referring to FIG. 4, in addition, the absorbing particles 21 of the present invention may also be absorbing particles 22 having a two-layer structure, that is, the inner layer 222 is a reflective material such as metal, and the outer layer 224 is a absorbing material, such as Carbide, medical stone, far infrared ceramics, tourmaline, etc. When the electromagnetic wave encounters, the double-layer structure absorbs the particles 22, the electromagnetic wave will first absorb, and the electromagnetic wave passing through the outer layer will encounter the inner layer to reflect back to the outer absorption layer, thereby greatly reducing the energy of the electromagnetic wave, even reaching the electromagnetic wave completely. absorb. Of course, the various particles mentioned above may be used alone or in combination to achieve better absorption and offset electromagnetic waves. Next, the reflective layer 2 of the present invention will be described. The reflective layer 2 of the present invention is located on the composite layer 1 for reflecting electromagnetic waves capable of traversing the composite layer back to the composite layer 1. Therefore, the reflection The material of layer 2 is selected according to the carrier 12 of the composite layer 1 to select 'the refractive index of the reflective layer 2 is greater than the refractive index η2 of the carrier 12, so that the electromagnetic wave is directed from the dense medium to the thin medium to conform to the blues. Under the conditions of the Brewsten angle, the amplitude increases the chance of electromagnetic waves reflecting back to the composite layer. In general, the θ alloy layer is used to form the refractive layer 2, or a stacked layer composed of an ingot layer, a nickel layer, an iron layer, a copper layer, and an initial layer; and when the alloy layer is selected, the alloy type is optional. It consists of self, record, iron, start, and steel, and can also add trace amounts of manganese. Hereinafter, the manufacturing method of the present invention will be described. Referring to FIG. 5, first, a molten polymer is provided as a carrier 12 as described in the step si; and then, in the carrier 12, as described in step S2. Mixing the foregoing particles, wherein the mixed particles are selected, and may be selected individually or in combination according to the above-mentioned reflective particles, absorbing particles, double-layer reflective particles, and double-layer absorbing particles: further, as shown in step S3, the process is performed. The carrier 12 is formed into a composite layer 1 , wherein the composite layer is formed into a desired thickness by an extrusion process during the molding process; finally, a reflective layer 2 is formed on the surface of the composite layer 1 as shown in step S4. The method for forming the reflective layer 2 may be selected from the group consisting of vacuum sputtering, electric recording, and the like. Moreover, in order to facilitate the application of the electromagnetic wave absorbing film of the present invention, a sizing step may be performed on the other side of the composite layer to form a glue layer 24 which can be adhered, as shown in step S5, or The other side of the reflective layer 2 is sized (the difference in the position of the glue is different depending on the position to be pasted), so that the user can adhere the present invention to the position where the electromagnetic wave is to be blocked, wherein the reflective layer 2 When the other side is sized, an insulating layer 26 is formed on the side of the reflective layer 2 to avoid current conduction. The finished product is as shown in FIG. Next, an embodiment of the present invention applied to an electromagnetic wave communication device such as a mobile phone will be described. First, as shown in FIG. 6, the application is applied to an antenna, and the mobile phone transmits electromagnetic wave signals by an electromagnetic wave transmitter and an antenna. It is transmitted to the base station, so the antenna is often the position where the electromagnetic wave is emitted, and the influence on the human body is often more significant. The present invention is directed to the problem of adhering the absorbing electromagnetic wave film of the present invention to the outside of the antenna. The bonding method, as shown in FIG. 6, forms or adheres to the periphery of the antenna 3 and the screwing member 4. The film 5, but needs to retain a width "a" without sticking or forming the absorbing film of the present invention for electromagnetic wave penetration, the width a is an integral multiple of the wavelength of the electromagnetic wave emitted by the mobile phone, and the width a is oriented away from the human body. The direction of the face. Moreover, as shown in Figure 7,
1249469 將本發明之吸收薄膜5黏貼在手機的殼體7内側的適當位置，以達到更 完善的電磁波防護。 當然，上述所舉例的方式是利用貼合方式來達成，另外也可藉由 將如手機殼體的零組件作為基底，而將本發明之吸收電磁波吸收薄膜 成型塗佈於基底上，來達到吸收電磁波的功效。因此，當以零組件為 基底時，本發明之電磁波吸收薄膜的製程將適度修正為先於零組件内 表面上形成一反射層，隨後將混合有粒子的複合層塗佈於反射層上。 然此一步驟上順序的修改，乃熟悉該項技藝者易於由本發明前述之步 驟修改得知，因此於此係不再贅述。1249469 Adhesive film 5 of the present invention is adhered to the proper position inside the casing 7 of the mobile phone to achieve better electromagnetic wave protection. Of course, the above-exemplified manner is achieved by using a bonding method, and the absorbing electromagnetic wave absorbing film of the present invention can be formed on a substrate by using a component such as a mobile phone case as a substrate. The effect of absorbing electromagnetic waves. Therefore, when the component is used as the substrate, the process of the electromagnetic wave absorbing film of the present invention is appropriately modified to form a reflective layer on the inner surface of the component, and then the composite layer in which the particles are mixed is applied onto the reflective layer. However, the modification of the sequence in this step is familiar to those skilled in the art and is susceptible to modification by the foregoing steps of the present invention, and therefore will not be further described herein.
綜上所述，本發明為一種電磁波吸收薄膜結構及其製造方法，其 主要係利用波的相位相消特性與折射、吸收，使電磁波間產生抵銷， =此’將不會產生—般制金屬屏庇材時，需接地以將受驅使電子導 流之必要，更者，本發明以相位相消的原理為基礎下，僅需一複合層 即可達到將電磁波絲的目的，將使得防電磁波材進人―薪新輕薄^匕 的技〗标領域。 惟以上所述者，僅為本發明一較佳實施例而已，並非用來限定本 發明實施之顧，故舉凡依本發明巾請專繼騎述之形狀、構造、 特徵及精神所為之鱗變化與修飾，均應包括於本發明之巾請專利 圍内。 【圖式簡單說明】 第1圖為本發明之載體内僅混人單層與雙層反射粒子的實施例示意圖 第2圖為描述波於雙層結構之反射粒子㈣收、折射、反射的示意:圖 第3圖為本發明之載體内混人有單層與雙層反射粒子與單層吸 的實施例示意圖。 、單層吸 第4圖為本發明之紐舰有單層反齡子、雙層反射粒子 收粒子及雙層吸收粒子的實施例示意圖。 第5圖為本發明之製程步驟流程圖。 第6圖為本發明應用手機天線的實施例示意圖。 第7圖為本發明應用於手機殼體的實施例示意圓。 1249469 【主要元件符號說明】 1複合層 12載體 14粒子 16反射粒子 18反射粒子 182内層 184外層 2反射層 21吸收粒子 22吸收粒子 222内層 224外層 24膠層 26絕緣層 3天線 4螺固元件 5吸收薄膜 6欲屏蔽物 7殼體In summary, the present invention is an electromagnetic wave absorbing film structure and a manufacturing method thereof, which mainly utilizes phase phase cancellation characteristics and refraction and absorption of waves to cause offset between electromagnetic waves, and this will not produce a general system. When the metal screen is used as a material, it needs to be grounded to drive the electrons to be diverted. Moreover, the invention is based on the principle of phase cancellation, and only needs a composite layer to achieve the purpose of electromagnetic wave, which will prevent The electromagnetic wave material enters the field of "new salary and lightness". However, the above description is only a preferred embodiment of the present invention, and is not intended to limit the implementation of the present invention. Therefore, the scale, shape, structure, and spirit of the bicycle according to the present invention are varied. And the modifications should be included in the patent application of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing an embodiment in which only a single layer and a double layer of reflective particles are mixed in a carrier of the present invention. FIG. 2 is a schematic view showing the reflection, refraction, and reflection of a reflecting particle (four) in a two-layer structure. Fig. 3 is a schematic view showing an embodiment in which a single layer and a double layer of reflective particles and a single layer are absorbed in a carrier of the present invention. Single layer suction Fig. 4 is a schematic view showing an embodiment of a single ship with a single layer of anti-age, double-layered reflective particles and double-layered particles. Figure 5 is a flow chart of the process steps of the present invention. FIG. 6 is a schematic diagram of an embodiment of an application mobile phone antenna according to the present invention. Figure 7 is a schematic circle of an embodiment of the present invention applied to a mobile phone case. 1249469 [Description of main component symbols] 1 composite layer 12 carrier 14 particle 16 reflective particle 18 reflective particle 182 inner layer 184 outer layer 2 reflective layer 21 absorbing particle 22 absorbing particle 222 inner layer 224 outer layer 24 adhesive layer 26 insulating layer 3 antenna 4 screw solid element 5 Absorbing film 6 for shielding 7 housing