RF Skin Treatment Electrodes With Dielectric Depth Control
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Solution Overview
Problem
Existing high-frequency skin treatment technologies face inefficiencies due to excessive skin penetration depth, which reduces treatment efficacy, and achieving a depth of 0.5 mm with frequencies above 500 GHz is technically challenging.
Innovation Solution
A skin treatment device using radio frequency (RF) with a dielectric sheet between electrodes to focus discharges in the dermis layer, employing frequencies of 4-15 MHz and a cooling mechanism to prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high-frequency current is applied to skin treatment, then deep heat is generated to enhance treatment effects, but the skin penetration depth becomes excessive (about 919 mm at 1 MHz) which reduces treatment efficiency
Solution Approach 1:
A dielectric sheet is introduced as an intermediary substance between the electrode and skin. This dielectric sheet has specific electrical properties that modify the distribution of high-frequency current, concentrating it in the dermis layer rather than allowing excessive penetration. The dielectric sheet acts as a mediator that controls the interaction between the electromagnetic field and skin tissue, achieving optimal treatment depth.
Solution Approach 2:
The invention changes the electrical parameters of the treatment system by introducing a dielectric material with specific permittivity and loss tangent properties. This parameter change modifies the skin depth and current distribution, concentrating the therapeutic effect in the dermis layer while preventing excessive penetration into deeper tissues. The dielectric sheet's electrical parameters are selected to achieve the desired depth control.
2Length of stationary object
If frequency is increased to reduce skin depth to 0.5 mm, then treatment efficiency improves, but frequency of about 500 GHz is required which is technically very difficult to achieve
Solution Approach 1:
Instead of using an extremely high frequency (500 GHz) to achieve the desired skin depth, the invention introduces a dielectric sheet as an intermediary that modifies the electromagnetic field distribution at achievable frequencies (4-15 MHz). This intermediary approach allows depth control without requiring technologically infeasible frequency generation.
Solution Approach 2:
Rather than changing the frequency parameter to an unachievable 500 GHz, the invention changes the electrical environment parameters by introducing a dielectric sheet with specific permittivity and loss characteristics. This parameter change in the medium allows achieving the desired skin depth at practical, achievable frequencies.
3Reliability
If high-frequency current flows through skin, then treatment effects are achieved, but excessive penetration causes inefficiency in skin treatment
Solution Approach 1:
The dielectric sheet serves as a mediator that guides and confines the high-frequency current flow to the appropriate depth in the skin. By controlling the current distribution, it ensures that energy is deposited where needed (dermis layer) rather than being lost to excessive penetration, thereby improving treatment efficiency and reducing energy waste.
Data Source
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AI summary
The present invention provides a skin treatment device using radio frequency, the device comprising: a pair of electrodes including a first electrode and a second electrode and forming a bipolar electrode structure; an RF generation unit which has an output power of 100-500 W, and produces a radio frequency current of 4-15 MHz and supplies same to the first electrode and the second electrode so as to cause a discharge therebetween; a dielectric sheet on which the pair of electrodes is integrally formed and which is disposed to cover a skin portion to be treated, in a contact or non-contact type in the middle of a discharge path between the first electrode and the second electrode; and a cooling part including a nozzle for spraying a cooling fluid so as to cool the dielectric sheet.