Analog & digital design
Please leave it to me.

Good at prototype and small lot products!!
From the substrate design and schematic, it is the task of determining the placement of parts and the wiring route. The substrate design ensures proper signal transmission and power supply of electronic circuits.
- Ideal layer configuration for circuits
- Transmission circuit simulation
- Impedance control simulation
- Inspection by test piece
- Suggestion of substrate material
- Heat dissipation
- High frequency
- High density
- Great current
- flexion
- High voltage
- One-sided/2-layer ( Both sides )
- 4 layers
- 8 layers
- High multi-layer
- Substrate material: FR-4 CEM3 Megtron material FR-5 polyimide material

We can help from the planning stage!
Not only electronic circuits, but also peripheral accessories such as enclosures and parts are designed and manufactured at the same time.
Exterior dimensions and images alone are fine. The technician will interview you directly to create a drawing containing the manufacturing instructions.
- Circuit design and proposal including MCU control etc.
- Processing of aluminum case/resin case/panel etc.
- 3D printer output
- Help from the product planning stage

Select factory according to product
At Tohwa Circuit, we work with several domestic manufacturers that can handle small lots, prototypes and mass production (continuous production). In it, we request and manufacture the best factory according to the customer's request. It also supports small-scale trials of about 3 pieces of manufacture.
- Various prototypes (from general-purpose substrates to special substrates)
- Trial → Migrated to small lot and stable repeat manufacturing
- Stable manufacture of repeat proposals that will continue for more than 10 years
- Quality assurance: Response based on JPCA standard
- Factory location: from within 23rd ward of Tokyo, Chiba, Saitama, Nagano, Aichi, Osaka, etc.
- High difficulty special substrate (high multi-layer aluminum substrate, etc.)

Original productization is also OK!
Please also suggest a reduction in prototype costs, create a specification drawing necessary for cable production, and use the wiring branch.
You can suggest a wiring method with mass production costs in mind and a standard material with good availability.
- Installation on cable harness cases
- Product assembly
- Parts arrangement
- Parts management
Information and data needed when requesting substrate manufacturing
- Substrate manufacturing: Gerba data output from substrate design
- Part implementation: Mount data, implementation diagram, metal mask data
Fast delivery design
Since we can work on one board at the same time, we have realized a short delivery design.
We are able to flexibly respond to the design of the haste according to your request.
Quality assurance
We provide high quality board design in a management system that is compliant with international quality systems and has been cultivated by many years of experience.
Corresponding CAD
OrCAD
CADVANCE α
Frequently Asked Questions
What is a printed board?
See "Printed Substrate" ( April 23, 2023 ( Day )02:01 UTC Edition ) 『Wikipedia Japanese Version 』.
Is it possible to manufacture small lots?
We will undertake design trials and implementations from one board prototype.
Is it possible to manufacture special substrates?
It is almost possible to manufacture a wide variety of substrate materials, and for substrates such as resin embedding.
This is the first time I have asked for a printed circuit board, what do I need?
If there is a minimum schematic diagram or the materials underneath it, we will firmly design and manufacture the upper board of the hearing.
I want to redesign what I used to design, how can I do it?
If you let us know the revised version, we will only support the revised design of the difference from our data.