摘要:
A method and system for etching features in a substrate, whereby silicon oxide or silicon nitride or both are etched with high selectivity relative to silicon. In one embodiment, the process chemistry utilized to achieve high selectivity includes trifluoromethane (CHF3), difluoromethane (CH2F2), an oxygen containing gas, such as O2, and an optional inert gas, such as argon.
摘要翻译:用于蚀刻衬底中的特征的方法和系统,由此相对于硅以高选择性蚀刻氧化硅或氮化硅或两者。 在一个实施方案中,用于实现高选择性的方法化学品包括三氟甲烷(CH 3)3,二氟甲烷(CH 2 SO 2 H 2),氧 例如O 2,以及任选的惰性气体,例如氩气。
摘要:
A gas injection system includes a diffuser to distribute a process gas in a processing chamber. The gas injection system may be utilized in a polysilicon etching system involving corrosive process gases.
摘要:
A method for etching a high-k dielectric layer on a substrate in a plasma processing system is described. The high-k dielectric layer can, for example, comprise HfO2. The method comprises elevating the temperature of the substrate above 200° C. (i.e., typically of order 400° C.), introducing a process gas comprising a halogen-containing gas, igniting a plasma from the process gas, and exposing the substrate to the plasma. The process gas can further include a reduction gas in order to improve the etch rate of HfO2 relative to Si and SiO2.
摘要:
A method for etching a high-k dielectric layer on a substrate in a plasma processing system is described. The high-k dielectric layer can, for example, comprise HfO2. The method comprises elevating the temperature of the substrate above 2000°C. (i.e., typically of order 400° C.), introducing a process gas comprising a halogen-containing gas, igniting a plasma from the process gas, and exposing the substrate to the plasma. The process gas can further include a reduction gas in order to improve the etch rate of HfO2 relative to Si and SiO2.
摘要:
A gas injection system includes a diffuser to distribute a process gas in a processing chamber. The gas injection system may be utilized in a polysilicon etching system involving corrosive process gases.
摘要:
A method for etching an organic anti-reflective coating (ARC) layer on a substrate in a plasma processing system comprising: introducing a process gas comprising nitrogen (N), hydrogen (H), and oxygen (O); forming a plasma from the process gas; and exposing the substrate to the plasma. The process gas can, for example, constitute an NH3/O2, N2/H2/O2, N2/H2/CO, NH3/CO, or NH3/CO/O2 based chemistry. Additionally, the process chemistry can further comprise the addition of helium. The present invention further presents a method for forming a bilayer mask for etching a thin film on a substrate, wherein the method comprises: forming the thin film on the substrate; forming an ARC layer on the thin film; forming a photoresist pattern on the ARC layer; and transferring the photoresist pattern to the ARC layer with an etch process using a process gas comprising nitrogen (N), hydrogen (H), and oxygen (O).
摘要翻译:一种用于在等离子体处理系统中蚀刻衬底上的有机抗反射涂层(ARC)层的方法,包括:引入包含氮(N),氢(H)和氧(O)的工艺气体; 从工艺气体形成等离子体; 并将衬底暴露于等离子体。 工艺气体可以例如构成基于NH 3 / O 2,N 2 / H 2 / O 2,N 2 / H 2 / CO,NH 3 / CO或NH 3 / CO / O 2的化学。 另外,工艺化学可以进一步包括添加氦。 本发明还提供一种用于形成用于在衬底上蚀刻薄膜的双层掩模的方法,其中所述方法包括:在所述衬底上形成所述薄膜; 在薄膜上形成ARC层; 在ARC层上形成光刻胶图案; 以及使用包含氮(N),氢(H)和氧(O)的工艺气体的蚀刻工艺将光致抗蚀剂图案转移到ARC层。
摘要:
A processing gas constituted of CH2F2, O2 and Ar is introduced into a processing chamber 102 of a plasma processing apparatus 100. The flow rate ratio of the constituents of the processing gas is set at CH2F2/O2/Ar=20 sccm/10 sccm/100 sccm. The pressure inside the processing chamber 102 is set at 50 mTorr. 500 W high frequency power with its frequency set at 13.56 MHz is applied to a lower electrode. 108 on which a wafer W is placed. The processing gas is raised to plasma and thus, an SiNx layer 206 formed on a Cu layer 204 is etched. The exposed Cu layer 204 is hardly oxidized and C and F are not injected into it.
摘要翻译:由等离子体处理装置100的处理室102引入由CH 2 2 2 O 2 O 2,O 2和Ar构成的处理气体。 处理气体的成分的流量比设定为CH 2/2 / 2/2 / Ar = 20sccm / 10sccm / 100 sccm。 处理室102内的压力设定在50mTorr。 将其频率设定为13.56MHz的500W高频功率施加到下电极。 108,其上放置有晶片W. 处理气体升至等离子体,因此蚀刻在Cu层204上形成的SiN x层206。 暴露的Cu层204几乎不被氧化,并且C和F不被注入其中。
摘要:
A processing gas constituted of CH2F2, O2 and Ar is introduced into a processing chamber 102 of a plasma processing apparatus 100. The flow rate ratio of the constituents of the processing gas is set at CH2F2/O2/Ar=20 sccm/10 sccm/100 sccm. The pressure inside the processing chamber 102 is set at 50 mTorr. 500 W high frequency power with its frequency set at 13.56 MHz is applied to a lower electrode. 108 on which a wafer W is placed. The processing gas is raised to plasma and thus, an SiNx layer 206 formed on a Cu layer 204 is etched. The exposed Cu layer 204 is hardly oxidized and C and F are not injected into it.
摘要:
A method is provided for low-pressure plasma ashing to remove photoresist remnants and etch residues that are formed during preceding plasma etching of dielectric layers. The ashing method uses a two-step plasma process involving an oxygen-containing gas, where low or zero bias is applied to the substrate in the first cleaning step to remove significant amount of photoresist remnants and etch residues from the substrate, in addition to etching and removing detrimental fluoro-carbon residues from the chamber surfaces. An increased bias is applied to the substrate in the second cleaning step to remove the remains of the photoresist and etch residues from the substrate. A chamber pressure less than 20 mTorr is utilized in the second cleaning step. The two-step process reduces the memory effect commonly observed in conventional one-step ashing processes. A method of endpoint detection can be used to monitor the ashing process.
摘要:
In an etching method for etching an etching target film formed on a substrate placed inside an airtight processing chamber 104 by inducing a processing gas into the processing chamber 104, the processing gas contains CF4, N2 and Ar and the etching target film is constituted of an upper organic polysiloxane film and a lower inorganic SiO2 film. The flow rate ratio of CF4 and N2 in the processing gas is essentially set within a range of 1≦(N2 flow rate/CF4 flow rate)≦4. If (N2 flow rate/CF4 flow rate) is less than 1, an etching stop occurs and, as a result, deep etching is not achieved. If, on the other hand, (N2 flow rate/CF4 flow rate) is larger than 4, bowing tends to occur and, thus, a good etching shape is not achieved. Accordingly, the flow rate ratio of CF4 and N2 in the processing gas should be set essentially within a range of 1≦(N2 flow rate/CF4 flow rate)≦4, to ensure that improvements in both the selection ratio and the etching shape are achieved.