201228819 六、發明說明： 【發明所屬之技術領域】 本發明關於一種板材尤指一種提供雙色外觀之板材。 【先前技術】 電子產品逐漸成為現代生活中不可或缺的一環，除了不 ^推陳出新的諸多功能，外觀也成為消費者選購的重要考 里之一。常見的電子產品外殼包含有金厲外殼及陶党外殼 等而物理氣相沉積（以下簡稱PVD)技術已經廣泛應用於 ^屬表面裝飾領域’由於PVD鍍製的膜層具有良好的抗磨 損抗腐钮等性月b，因此在手機和手錶的外觀件上已經被 大量知用。但疋在上述產品上提供pvD鏟臈的同時，產品 為大出其牌，一般在外觀件表面都有很明顯的品牌標 言志。目前比較通用的製作標認方法有化學钮刻法，鐘射法 和絲印油墨法。 化學蝕刻法需要先利用到感光顯影技術產生圖案，再用 很強的腐鞋性溶液腐韻掉圓案部分的膜層或基材，但很強 的腐蝕液也很容易出現側蝕的現象’這樣製作出的圖案邊 緣不元整而且失去原有的外觀效果。此外，化學钱刻法 所使用的Μ液通常是強酸或㈣，對環境有極大 響。 " 鐳射法很容易雕刻掉PVD鑛層，並得到邊緣很完美的圖 案’但是由於鐘射所產生的高能量會使圖案區域的金屬層 嚴重氧化發黃，同樣也會失去原有的外觀效果。 此外，以上兩種方法產生的圖案只能是金屬原來的顏 I52707.doc 201228819 色，視覺效果比較單一。使用絲印油墨法可以在鍍層 上印出各種顏色的圖案，但是其耐磨性很差。 以上三種方法都不能提供既可以保持PVD膜層的外觀效 果，又產生不同顏色效果的標誌圖案，因此如何提供一雙 色表面之板材，其不僅可以產生不同顏色之外觀效果，並 可以防止PVD膜層被刮傷、腐姓或㈣，成為本發明之重 點。 【發明内容】 本發明之一實施例提供一種可提供雙色表面之板材，包 含：一金屬或陶曼材質之基板；一犧牲層，其位於該基板 之上方並相較於該基板更易於被化學溶液腐蝕；一第一顏 色層，其位於該犧牲層之上方；及一過渡層，位於該第一 顏色層之下方，以增強其上下兩層之結合力。 本發明之另一實施例提供一種於一板材上形成雙色表面 之方法，包含：提供如上一個實施例之板材；以鐳射雕刻 该板材，以刻掉該犧牲層上方之各層以及該犧牲層之部分 厚度；及利用化學溶液將鐳射雕刻後剩餘之犧牲層部分去 除。 本發明之一較佳實施例提供之板材另包含一第二顏色 層’其係位於該犧牲層與該過渡層之間。 依據一較佳實施例’本發明所使用的第一及第二顏色 層，其材質包含鉻（cr)、氮化鉻（CrN)、碳化鉻（CrC)、碳 化鈦（TlC)、氮化鈦（TiN)及碳氮化鈦（TiNC)其中一種金屬 或金屬化合物。依據一較佳實施例，本發明所使用的過渡 152707.doc 201228819 層為金屬層或硬質膜層’此外本發明使用的犧牲層之材質 包含鈦（Ti)、鎢（W)、鉻（Cr)及鍅（zr)其中之一金屬，犧牲 層使用之金屬材質與其上下兩層不同，並可增加與上下兩 層之結合力。 本發明所提供之板材不但可利用不同顏色形成背景和圖 案、更可提供極細線寬之圖案，同時具有保持板材抗刮 傷、抗磨損及抗腐14的性能。 為了使本發明的前述和其他目的、特徵和優點更易於理 解’下文詳細描述伴有圖式的較佳實施例。 【實施方式】 圖la為本案之一實施例，其為一種可提供雙色表面之板 材，其顯示之圖案為基板丨之顏色，並且以第一顏色層4為 背景顏色。在本實施例+，基板i可為金屬或陶瓷材質， 犧牲層2係由純金屬所構成，其金屬可包含鈦（Ti)、鎢 (W)、鉻(Cr)及錯(Zr)等其_之一種金屬，形成該犧牲層2 的金屬與其上下兩層不同，並真有與其上下兩層良好之結 力犧牲層2的主要目的之一是在利用鐳射雕刻圖案時 用來保護基板！。此外，犧牲層2相較於其上下層（例如基 板）更易於被化學溶液腐蝕。依據一較佳實施例，根據 其上下層材質之不同，犧牲層2之厚度為G.2 Um-G.5 um。 過渡層3可為任意金屬層或者硬質膜層(hard coating lay^ei·) ’其主要功能係用來增強其上下兩層之結合力，如 果/過渡層3選擇硬質膜層當材料，還可以達到耐刮傷及 耐磨損的功能. A 〇 第一顏色層4可為金屬或金屬化合物所構 152707.doc 201228819 成”可包3鉻（Cr)、氮化鉻（CrN) '碳化鉻（CrC)、碳化 鈦（Tic)、氮化鈦（TiN)及碳氮化鈦（TiNc)等其中一者第 -顏色層4主要是用來顯示該板材之背景顏色，因此第一 顏色層4之材質挑選係以所欲表現之顏色為主。 圖顯示形成該雙色表面之板材之方法，圖^為第 一步驟，利用物理氣相沉積法，依序形成基板丨、犧牲層 2、過渡層3及第-顏色層4,膜層的生成可以利用真空錢 膜的各種技術，也可以由其他之方法所形成。 本案之-較佳實施例巾，㈣的生成係採用目筒型磁控 濺射鍍膜設備，靶材使用對濺射直接水冷孿生旋轉圓柱 靶。電源採用中頻磁控濺射電源。在同—真空室内安裝不 同的靶材，並按照設計好的膜層結構設定好工藝參數，即 可依次沉積鍍膜。由於圓筒型磁控濺射鍍膜設備之操作並 非本發明重點’故不於此賛述。 表1為形成各膜層之一實施例： 組合方案 ------- 膜層結構 ------- 膜層成份 靶材功率 鍍膜時間 膜層厚度 (KW) (Min) __(Um) 背景顏色 為黑色/圖 案標誌、為 金屬原色 犧牲層 過渡金屬 (例如錄） 4〜8 15-25 0.2-0.5 過渡層 ---^ 碳化鉻 (CrC) 6〜10 35-45 1.2-2 顏色層 碳化鈦 (TiC) 4〜8 50 〜60 0.4-0.8 —_1 圖lb為形成該雙色表面之板材之第二步驟，亦即利用錯 152707.doc 201228819 射來雕刻所需顯示之圓案’錯射之功率可調整成使其剛好 可雕刻掉犧牲層2上方之各膜層及犧牲層的部分膜層，在 本案之—實施例中，可雕刻掉犧牲層1/3_1/2的厚度。以表 1之實施例為例’欲穿透厚度約2 um之顏色層4加過渡層 3，所需使用的鐳射功率為4W。 圖lc為形成5亥雙色表面之板材之第三步㉟，利用高選擇 性的化學溶液將犧牲層2之剩餘膜層腐蝕掉，該高選擇性 之化學溶液係針對該犧牲層2之材質做的選擇，該化學溶 液對犧牲層2之腐蝕速度較其他膜層快速許多，因此可以 在其他膜層未被腐蝕之前，快速的將犧牲層2之剩餘膜層 腐蝕掉，卻又不會腐蝕犧牲層下方之基板。 在本案之一實施例中，化學溶液的主要配方可為 1〇%〜5〇%酸+0.1%〜以。/。濕潤劑+0.1%〜5%,緩㈣卜酸為硝 酉夂 '鹽酸、硫酸、高氣酸、醋酸、碌酸、氨基續酸、氫氟 酸、氟删酸、W酸等各種酸中的—種或幾種混合。濕潤 劑為AE09、OP-1 〇等非離子表面活性劑。緩蝕劑一般為磷 酉夂(鹽）、硫脲、烏洛托品、苯並三唑等一種或幾種的混 合〇 圖2a為本案之另一實施例，利用第一顏色層4及第二顏 色層5使其為一種可提供雙色表面之板材，其中該板材之 第顏色層4係為背景的顏色，而第二顏色層5則是圖案標 誌顏色。圖2a中各層之選擇及特性皆與圖u中同名元件相 同但其排列順序由上至下為第一顏色層4、犧牲層2、第二 J色層5過渡層3及基板1。圖2a與圖la之板材的主要差 152707.doc 201228819 別在於增加一第二顏色層5。第二顏色層5可為金屬或金屬 化合物所構成，其可包含鉻（Cr)、氮化鉻（CrN)、碳化鉻 (CrC)、碳化鈦（TiC)、氮化鈦（ΉΝ)及碳氮化鈦（TiNC)等其 中一者。由於第二顏色層5主要是用來顯示該板材之圖案 標誌顏色，而第一顏色層4係用來顯示背景之顏色，因此 該第—顏色層4及第二顏色層5之材質挑選係以所欲表現之 顏色為主。 圖2a-2c顯示形成該雙色表面之板材之方法，圖&為第 一步驟，利用物理氣相沉積法，依序形成基板丨、過渡層 3、第一顏色層5、犧牲層2及第一顏色層4。膜層的生成可 以利用真空鍍膜的各種技術，也可以由其他之方法所形 成》 本實施例中，膜層的生成係採用圓筒型磁控濺射鍍膜設 備’靶材使用對賤射直接水冷孿生旋轉圓柱^電源採用 中頻磁控濺射電源。在同-真空室内安裝不同的乾材，並 按照設計好的膜層結構，設定好工藝參數依次沉積鍍膜。 表2為形成各膜層之一實施例： 組合方案 膜層結構 膜層成份 (KW) (Min) 膜層厚度 i nm^ 過渡層 奴化絡 (CrC) 6〜10 35-45 _VUMI/ 1.2-2 Pi ^ MM Sj 為金色/圖 背景顏色層 碳化鈦 (Tic) 4〜8 50 〜60 0.4-0.8 荼顏色為 黑色 犧牲層 過渡金屬 (例如鎳） 4〜8 15-25 0.2-0.5 圖案顏色層 氮化鈦 (ΉΝ) 4〜8 50 〜60 0.4-0.8 152707.doc 201228819 圖2b顯不形成該雙色表面之板材之第二步驟，利用鐳射 來雕刻所f顯示之圖案，調整鐳射之功率，使其剛好可雕 刻掉犧牲層2上方之第一顏色層4及犧牲層2的部分膜層， 在本案之一較佳實施例中，可雕刻掉犧牲層ι/3_ι/2的厚 圖2’示形成該雙色表面之板材之第三步驟，利用高選 擇性的化學溶液將犧牲層2之剩餘膜層腐蝕掉，該高選擇 性之化學溶液係針制犧牲層2之材質所做的選擇，該化 學溶液對犧牲層2之腐姓速度較其他膜層（例如第二顏色層 5)快速許多’因此可以在其他膜層未被腐#之前，快速的 將犧牲層2之剩餘膜層腐蝕掉，卻又不會腐蝕犧牲層下方 之第二顏色層5。 在本案之一實施例中，化學溶液的主要配方可屬 10%〜50%酸+0.1%〜1〇%濕潤劑+〇 1%〜5%緩蝕劑。酸為却 酸、鹽酸、硫酸、高氯酸、醋酸、磷酸、氨基磺酸 '氫翁 酸、氟硼酸、氟矽酸等各種酸中的一種或幾種混合。濕潘 劑為AEG9、〇Ρ·1〇等非離子表面活性劑。緩㈣卜般為構 酸（鹽）、硫腺、烏洛托品、苯並三吐等一種或幾種的混 合0 本發明先使用雷射雕刻法刻去基板或第二顏色層以上之 各層，僅留下部分易於被化學溶液蝕刻之犧牲層，然後再 以腐蝕性較-般化學蝕刻所用溶液弱的化學溶液來蝕刻犧 牲層。如此一來，所使用之化學溶液較不致造成環境污 染，也較不會產生傳統化學蝕刻法的側蝕問題。此外，由 152707.doc •10- 201228819 於基板或第二顏色層受到犧牲層的保護不受雷射照射，因 此也不會產生氧化發黃之現象。如此一來，藉由本發明之 所產生之雙色板才可利用不同顏色形成背景和圖案、更可 提供極細線寬之圖案，同時具有保持板材抗刮傷、抗磨損 及抗腐蝕的性能。 雖然本發明之技術内容與特徵係如上所述，然於本發明 之技術領域具有通常知識者仍可在不悖離本發明之教導與 揭露下進行許多變化與修改 因此，本發明之範疇並非限 定於已揭露之實施例而係包含不悖離本發明之其他變化與 修改，其係如下列申請專利範圍所涵蓋之範疇。 【圖式簡單說明】 圖la顯示形成雙色表面之板材之第一步驟，利用物理氣 相沉積生成各膜層，其中該板材具有一顏色層。 圖lb顯示形成雙色表面之板材之第二步驟，矛㈣錯射雕 刻所欲得到之圖案。 圖1c顯示形成雙色表面之板材之第三步驟，利用化學溶 液將犧牲層剩餘膜層去除。 圖2a顯示形成雙色表面之板材之第一步驟，利用物理氣 相沉積生成各膜層，其中該板材具有兩層顏色層。 圖2b顯示形成雙色表面之板材之第二步驟，利用鐳射雕 刻所欲得到之圖案。 圖2c顯示形成雙色表面之板材之第三步驟，利用化學溶 液將犧牲層剩餘膜層去除。 ' 【主要元件符號說明】 152707.doc 201228819 1 基板 2 犧牲層 3 過渡層 4 第一顏色層 5 第二顏色層 152707.doc - 12-201228819 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a sheet material, especially a sheet material which provides a two-color appearance. [Prior Art] Electronic products have gradually become an indispensable part of modern life. In addition to not being able to introduce new functions, the appearance has become one of the important tests for consumers to purchase. Common electronic product casings include Jin Li shell and Tao party shell, and physical vapor deposition (hereinafter referred to as PVD) technology has been widely used in the field of surface decoration. 'The PVD coated film has good anti-wear and anti-corrosion. The button is equal to the month b, so it has been widely used on the appearance of mobile phones and watches. However, while the pvD shovel is provided on the above products, the products are out of the brand, and generally there is a clear brand logo on the surface of the appearance parts. At present, the most common methods for production identification include chemical button engraving, clock shooting and screen printing ink. The chemical etching method needs to first use the photosensitive developing technology to produce a pattern, and then use a strong rot-resistant solution to rot the film layer or substrate of the round part, but a strong etching liquid is also prone to side etching phenomenon. The edges of the pattern thus produced are not uniform and lose the original appearance. In addition, the sputum used in chemical engraving is usually strong acid or (iv), which is extremely irritating to the environment. " The laser method is easy to engrave the PVD ore layer and get a perfect pattern on the edge'. However, due to the high energy generated by the clock, the metal layer in the pattern area will be severely oxidized and yellow, and the original appearance will also be lost. . In addition, the pattern produced by the above two methods can only be the original color of the metal I52707.doc 201228819 color, the visual effect is relatively simple. Screen printing inks can be used to print patterns of various colors on the plating layer, but the abrasion resistance is poor. None of the above three methods can provide a logo pattern that can maintain the appearance of the PVD film layer and produce different color effects. Therefore, how to provide a two-color surface sheet can not only produce different color appearance effects, but also prevent PVD film layers. Being scratched, rotted or (4) has become the focus of the present invention. SUMMARY OF THE INVENTION An embodiment of the present invention provides a two-color surface plate comprising: a metal or a Tauman substrate; a sacrificial layer positioned above the substrate and more susceptible to chemistry than the substrate The solution is etched; a first color layer is located above the sacrificial layer; and a transition layer is located below the first color layer to enhance the bonding force of the upper and lower layers. Another embodiment of the present invention provides a method of forming a two-color surface on a sheet comprising: providing a sheet of the above embodiment; engraving the sheet with laser to engrave the layers above the sacrificial layer and portions of the sacrificial layer Thickness; and partially removing the remaining sacrificial layer after laser engraving using a chemical solution. A preferred embodiment of the present invention provides a sheet material further comprising a second color layer' disposed between the sacrificial layer and the transition layer. According to a preferred embodiment, the first and second color layers used in the present invention comprise chromium (cr), chromium nitride (CrN), chromium carbide (CrC), titanium carbide (TlC), titanium nitride. (TiN) and one of the metals or metal compounds of titanium carbonitride (TiNC). According to a preferred embodiment, the transition 152707.doc 201228819 layer used in the present invention is a metal layer or a hard film layer. Further, the material of the sacrificial layer used in the present invention comprises titanium (Ti), tungsten (W), chromium (Cr). And 鍅(zr) one of the metals, the metal material used for the sacrificial layer is different from the upper and lower layers, and can increase the bonding force with the upper and lower layers. The sheet provided by the present invention can not only form a background and a pattern by using different colors, but also provide a pattern of extremely thin line width, while maintaining the performance of the sheet against scratching, abrasion and corrosion resistance 14. The foregoing and other objects, features and advantages of the present invention will become more apparent. [Embodiment] FIG. 1 is an embodiment of the present invention, which is a sheet material capable of providing a two-color surface, the pattern of which is the color of the substrate ,, and the background color of the first color layer 4 is used. In the embodiment +, the substrate i may be made of metal or ceramic, and the sacrificial layer 2 is made of pure metal, and the metal may include titanium (Ti), tungsten (W), chromium (Cr), and (Zr). One kind of metal, the metal forming the sacrificial layer 2 is different from the upper and lower layers, and there is a good bonding force with the upper and lower layers. One of the main purposes of the sacrificial layer 2 is to protect the substrate when using the laser engraving pattern! . In addition, the sacrificial layer 2 is more susceptible to corrosion by chemical solutions than its upper and lower layers (e.g., substrates). According to a preferred embodiment, the thickness of the sacrificial layer 2 is G.2 Um-G.5 um, depending on the material of the upper and lower layers. The transition layer 3 can be any metal layer or hard film layer (hard coating lay^ei·) 'its main function is to enhance the bonding force between the upper and lower layers, if the / transition layer 3 selects the hard film layer as the material, it can also Achieve scratch and wear resistance. A 〇The first color layer 4 can be made of metal or metal compound 152707.doc 201228819 into "can be 3 chromium (Cr), chromium nitride (CrN) 'chromium carbide ( One of the first color layer 4 of CrC), titanium carbide (Tic), titanium nitride (TiN), and titanium carbonitride (TiNc) is mainly used to display the background color of the plate, so the first color layer 4 The material selection is mainly based on the color to be expressed. The figure shows the method of forming the plate of the two-color surface, and the first step is to form the substrate 丨, sacrificial layer 2, and transition layer 3 by physical vapor deposition. And the first color layer 4, the formation of the film layer can be formed by various techniques of the vacuum film, or can be formed by other methods. The present invention - the preferred embodiment of the towel, (4) is produced by a cylindrical magnetron sputtering Coating equipment, target used for sputtering, direct water cooling, twin cylindrical rotating target The power supply adopts the medium frequency magnetron sputtering power supply. The different targets are installed in the same vacuum chamber, and the process parameters are set according to the designed film structure, so that the coating can be deposited in sequence. Due to the cylindrical magnetron sputtering coating equipment The operation is not the focus of the present invention, so it is not mentioned here. Table 1 is an example of forming each film layer: Combination scheme ------- Film structure ------- Film component target Power coating time film thickness (KW) (Min) __(Um) The background color is black/pattern mark, the metal primary color sacrificial layer transition metal (for example, recorded) 4~8 15-25 0.2-0.5 transition layer---^ Chromium carbide (CrC) 6~10 35-45 1.2-2 Color layer Titanium carbide (TiC) 4~8 50 ～60 0.4-0.8 —_1 Figure lb is the second step of forming the plate of the two-color surface, that is, the use of the wrong 152707.doc 201228819 The rounded case of the engraving required to be engraved can be adjusted so that it can just engrave the film layers above the sacrificial layer 2 and part of the film layer of the sacrificial layer, in the present case - in the embodiment The thickness of the sacrificial layer 1/3_1/2 can be carved away. Take the example of Table 1 as an example. A color layer of about 2 um 4 plus a transition layer 3, the required laser power is 4 W. Figure lc is the third step 35 of forming a sheet of 5 ha two-color surface, using the highly selective chemical solution to remnant the sacrificial layer 2 The film is etched away. The highly selective chemical solution is selected for the material of the sacrificial layer 2. The chemical solution has a much faster corrosion rate to the sacrificial layer 2 than other layers, and thus can be etched in other layers. Previously, the remaining layers of the sacrificial layer 2 were quickly etched away without damaging the substrate under the sacrificial layer. In one embodiment of the present invention, the main formulation of the chemical solution may be from 1% to 5% by weight of acid + 0.1%. /. Wetting agent +0.1%~5%, slow (four) acid is nitrate, 'hydrochloric acid, sulfuric acid, high gas acid, acetic acid, acid, amino acid, hydrofluoric acid, fluorine acid, w acid and other acids One or several kinds of mixing. The wetting agent is a nonionic surfactant such as AE09 or OP-1. The corrosion inhibitor is generally a mixture of one or more of phosphonium (salt), thiourea, urotropine, benzotriazole, etc. Figure 2a is another embodiment of the present invention, using the first color layer 4 and The two color layer 5 is a sheet which provides a two-color surface, wherein the first color layer 4 of the sheet is the background color, and the second color layer 5 is the pattern mark color. The selection and characteristics of the layers in Fig. 2a are the same as those of the same name in Fig. u, but the order of the top layer is the first color layer 4, the sacrificial layer 2, the second J color layer 5 transition layer 3, and the substrate 1. The main difference between the plates of Fig. 2a and Fig. 152707.doc 201228819 is not to add a second color layer 5. The second color layer 5 may be composed of a metal or a metal compound, which may include chromium (Cr), chromium nitride (CrN), chromium carbide (CrC), titanium carbide (TiC), titanium nitride (niobium), and carbon nitrogen. Titanium (TiNC) and the like. Since the second color layer 5 is mainly used to display the pattern mark color of the plate, and the first color layer 4 is used to display the color of the background, the material selection of the first color layer 4 and the second color layer 5 is The color of the desired performance is dominant. 2a-2c show a method of forming a plate of the two-color surface, and FIG. 2 is a first step of sequentially forming a substrate 丨, a transition layer 3, a first color layer 5, a sacrificial layer 2, and a portion by physical vapor deposition. One color layer 4. The formation of the film layer can be formed by various techniques of vacuum coating, or can be formed by other methods. In this embodiment, the film layer is formed by a cylindrical magnetron sputtering coating device, which is used for direct water cooling of the target. Twin rotating cylinder ^ power supply uses medium frequency magnetron sputtering power supply. Different dry materials are installed in the same vacuum chamber, and the coating parameters are sequentially deposited according to the designed film structure. Table 2 shows an example of forming each film layer: Combination scheme Film layer Composition (KW) (Min) Film thickness i nm^ Transition layer nucleation (CrC) 6~10 35-45 _VUMI/ 1.2-2 Pi ^ MM Sj is gold / figure background color layer titanium carbide (Tic) 4~8 50 ~ 60 0.4-0.8 荼 color is black sacrificial layer transition metal (such as nickel) 4~8 15-25 0.2-0.5 pattern color layer nitrogen Titanium (ΉΝ) 4~8 50 ～60 0.4-0.8 152707.doc 201228819 Figure 2b shows the second step of forming the two-color surface of the sheet, using laser to engrave the pattern shown by f, adjusting the power of the laser to make it The first color layer 4 above the sacrificial layer 2 and a portion of the film layer of the sacrificial layer 2 can be engraved. In a preferred embodiment of the present invention, the thick pattern 2' of the sacrificial layer ι/3_ι/2 can be engraved to form The third step of the two-color surface sheet etches away the remaining film layer of the sacrificial layer 2 by a highly selective chemical solution which is selected from the material of the sacrificial layer 2, the chemistry The speed of the solution to the sacrificial layer 2 is faster than that of other layers (for example, the second color layer 5) 'Before the other layers can be not rot # rapid sacrificial layer 2 of the remaining film is etched away, but not etching the second color layer under the sacrificial layer 5. In one embodiment of the present invention, the main formulation of the chemical solution may be 10% to 50% acid + 0.1% to 1% humectant + 〇 1% to 5% corrosion inhibitor. The acid is one or a mixture of various acids such as acid, hydrochloric acid, sulfuric acid, perchloric acid, acetic acid, phosphoric acid, sulfamic acid 'hydrogen acid, fluoroboric acid, and fluoroantimonic acid. The wet pan is a nonionic surfactant such as AEG9 or 〇Ρ·1〇. a combination of one or more of acid (salt), sulfur gland, urotropine, benzotrim, etc. The invention first uses a laser engraving method to engrave the substrate or layers above the second color layer. Only a portion of the sacrificial layer that is easily etched by the chemical solution is left, and then the sacrificial layer is etched by a chemical solution that is less corrosive than the solution used for chemical etching. As a result, the chemical solution used is less environmentally polluting and less prone to the side etching problem of conventional chemical etching. In addition, the substrate or the second color layer is protected from the laser by 152707.doc •10-201228819, so there is no oxidative yellowing. In this way, the two-color panel produced by the present invention can form a background and a pattern by using different colors, and can provide a pattern of extremely thin line width while maintaining the scratch resistance, abrasion resistance and corrosion resistance of the sheet. While the technical contents and features of the present invention are as described above, many variations and modifications can be made without departing from the spirit and scope of the invention. Other variations and modifications of the present invention are included in the disclosed embodiments, which are within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Figure la shows a first step of forming a sheet of a two-color surface, which is formed by physical vapor deposition, wherein the sheet has a color layer. Figure lb shows the second step of forming a sheet of a two-color surface, with the spear (four) misaligning the desired pattern. Figure 1c shows a third step of forming a sheet of a two-color surface with a chemical solution to remove the remaining film layer of the sacrificial layer. Figure 2a shows a first step of forming a sheet of a two-color surface, each layer being formed by physical vapor deposition, wherein the sheet has two layers of color. Figure 2b shows the second step of forming a sheet of a two-color surface, using laser to engrave the desired pattern. Figure 2c shows the third step of forming a sheet of a two-color surface with a chemical solution to remove the remaining film layer of the sacrificial layer. ' [Main component symbol description] 152707.doc 201228819 1 Substrate 2 Sacrificial layer 3 Transition layer 4 First color layer 5 Second color layer 152707.doc - 12-