摘要:
An electrostatic chuck is disclosed that is resistant to the formation of vacuum arcs between the back of the wafer being processed and the body of the chuck. A guard ring surrounds the chuck and floats close to the self-bias potential induced by the plasma on the wafer. The voltage between the wafer and the closest electrode is thereby capacitively divided by the guard ring.
摘要:
A process for etching aluminum wherein a masked layer of aluminum, supported on a substrate, is exposed to a plasma formed by imposing an RF voltage across at least two spaced electrodes in an ambient including a gas selected from the group consisting of CCl.sub.4, Cl.sub.2, Br.sub.2, HCl. The resultant conditions provide a reactive environment where the aluminum is bombarded with chlorine or bromine ions. The aluminum reacts with chlorine or bromine ions to form an aluminum chloride or bromide compound, which is volatile at the temperature of the sputtered substrate.
摘要:
Electron cyclotron apparatus is described in which the locus of cyclotron resonance is scanned away from and toward the axis of a magnetic field by varying the strength of the magnetic field, the frequency of electromagnetic waves passing along its axis, or both.
摘要:
A high rate, low contamination, non-reactive sputter etching or deposition apparatus is disclosed herein. The apparatus is comprised of a pair of parallel plate electrodes, cathode and substrate and an additional or wall electrode means surrounding said other electrode means. The wall electrode can be made to be coplanar with said other electrodes and the area of said electrodes are designed so that the wall electrode is resputtered eliminating contamination. The electrodes are housed in a vacuum chamber with inlet means for introducing a non-reactive gas into said chamber. Means are provided for supplying said RF voltage to said electrodes both in and out of phase and for varying the magnitude of the substrate electrode RF voltage with respect to the magnitude of the cathode voltage. Thick insulator rings are used to reduce stray capacitance between the wall electrode and ground whereby the outer chamber (normally grounded) forms a low inductance path between the cathode electrode and acts as a shield for the inner chamber RF potential.
摘要:
A metallic hollow cathode electrode structure for use in a RF-RIE sputter/etch system. The electrode defines a critical aspect ratio hollow cathode volume. In accordance with one embodiment of the invention, the electrode structure may consist of two closely spaced metal elements separated by a distance of a few centimeters. The elements are electrically and structurally connected by supports around their outer rim. An RF voltage is applied between the improved hollow cathode electrode structure and an evacuated chamber containing same through a suitable matching network. A plasma gas is supplied to the system from a point outside the electrodes and a suitable pumping system is used to maintain operating pressures in the 0.1 to 400 millitorr range. Samples to be sputtered are then placed on either of the inside electrode surfaces for sputter/etching. The aspect ratio (longest dimension of one of the elements/spacing between the elements) should be at least 4.According to a further embodiment, the hollow cathode electrode structure is characterized by a single plate having a plurality of cylindrical chambers or holes therein, each hole producing a hollow cathode glow when the system is energized. The aspect ratio (largest dimension of the chamber cross-section/depth of the chamber) for this embodiment should be at least 1.5.
摘要:
A quadrupole sputtering system having four electrodes comprised of a cathode, an anode, a cathode/anode shield and an electrically floating target shield circumscribing the source target of the cathode.
摘要:
The present invention provides a process which comprises:(a) producing an ion-implantation resistant island on a substrate;(b) growing ion-implantation resistant sidewalls on the island;(c) implanting a first impurity;(d) removing the sidewalls;(e) implanting a second impurity where the sidewalls were;(f) growing a conformal etchable coating over the surface of the device;(g) masking to define an area spaced from and exterior to the area where the sidewalls were;(h) removing the conformal etchable coating in the area of step (g);(i) etching a deep trench in the area where the conformal coating was removed;(j) implanting a third impurity into the deep trench.Following island removal, the emitter and base of a bipolar transistor are formed in the area where the island existed.
摘要:
An electrostatic chuck is disclosed that is resistant to the formation of vacuum arcs between the back of the wafer being processed and the body of the chuck. A guard ring surrounds the chuck and floats close to the self-bias potential induced by the plasma on the wafer. The voltage between the wafer and the closest electrode is thereby capacitively divided by the guard ring.
摘要:
An electrostatic chuck is made by a method in which the component parts are machined, then anodized to provide a hard insulating surface, and then assembled in a fixture, to provide a planar surface for wafer support that retains superior insulating properties; gas may be fed from the rim only, diffusing within interstices between the clamping surface and the wafer and maintaining a desired pressure by flowing radially through an impedance determined by the average spacing between clamping surface and wafer, thereby providing uniform pressure across the clamping surface without the use of elastomeric seals.
摘要:
An electrostatic chuck suppresses the formation of vacuum arcs between the back of the wafer being processed and the body of the chuck by the interposition of a guard ring that floats close to the self-bias potential induced by the plasma on the wafer, thereby capacitively dividing the voltage between the wafer and the closest electrode.