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Which one is better between Isola PCB & Nelco PCB?

In Bezug auf die Leistung, die Nelco-Leiterplatte and Isola PCB both works fine.This is because the they both offer excellent thermal and mechanical properties. Isola materials meet rohs standards, most of which have high heat reliability.This allows them to be assembled using leaded free.

There are many other Isola laminate except Isola 370HR, like: IS415, IS680, IS415, IS680, 185HR, FR402, FR406N, FR408, FR406, IS410, G200. These are also many similar high TG material, such as Shengyi S1000-2, IT180A, KB6167, Ventec VT-47, S1170.


How many layers does an Isola PCB pcb process?

Isola PCB is available in three main types: single side, double side, and multilayer. You can include different layers into the board as you want.

Die Anzahl der Schichten, die Sie in die Baugruppe einbeziehen, sollte der Betriebsfrequenz, der Pindichte und den Anforderungen an die Signalschicht Ihrer Schaltungsverbindung entsprechen.

We can make customized Isola PCB as per your requirements.

Unternehmen Isola 370HR is a  180°C high-performance glass transition temperature. These are commonly designed for any multilayer Printed Wiring Board applications that require maximum thermal reliability and performance. 

Our high-quality Isola 370HR prepreg and laminate are fabricated with a special multi-functional and high-performance epoxy resin. It is also reinforced with an Electrical grade glass fabric. Venture Isola Isola 370HR offers low expansion rates and enhanced thermal performance.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          

Your Leading Isola FR402 Supplier in China

Venture offers superior quality Isola 370HR with excellent thermal performance. Other than that, Our Isola 370HR is also equipped with moisture, chemical, and mechanical properties.

Venture Isola 370HR is a  180°C high-performance glass transition temperature. These are commonly designed for any multilayer Printed Wiring Board applications that require maximum thermal reliability and performance.

For a maximum Automated Optical Inspection system, photo imageable solder mask imaging, and optical positioning system compatibility, our Isola 370HR system also includes UV blocking and laser fluorescing. This gives high accuracy and throughput during the PCB fabrication as well as assembly.

Our high-quality Isola 370HR prepreg and laminate are fabricated with a special multi-functional and high-performance epoxy resin. It is also reinforced with an Electrical grade glass fabric. Venture Isola 370HR offers low expansion rates and enhanced thermal performance.

Our Isola 370HR also features CAF resistance and superior processing. It also has a prepreg standard availability such as panel or roll form and tooling of any prepreg panels.

Because of its advanced features, Venture Isola 370HR is proven to best applicable in any class for a sequential lamination design.

Are you looking for a high-quality Isola 370HR laminate and prepreg for your PCB requirements? Choose Venture as your top Supplier!

For more than 10 years, Venture has been a professional manufacturer of Isola 370HR. Through providing more excellent services, we have gained the trust of many customers from around the world.

Whether you are an integrator, electrical engineer, or distributor, Venture can always support you by providing flexible payment terms and competitive pricing yet no minimum order required!

Throughout the decade, we have taken advantage of advanced technologies and the latest equipment to manufacture Isola 370HR. Therefore, you can assure that we supply the highest-quality Isola 370HR!

If you have questions about our Isola 370HR, we have an approachable customer service team who will guide and assist you. They will ensure that you can have a stress-free purchasing experience!

Contact us directly for more inquiries! Expect a reply within 2 hours!

Isola 370HR: The Ultimate FAQs Guide


In this guide, you will find all information you’re looking for about Isola 370HR.

It covers everything, from features, advantages, applications, fabrication to thermal analysis techniques amongst others.

So, if you want to be an expert in Isola 370HR, this is the right guide for you.

What is Isola 370HR?

Isola 370HR are laminates and prepregs manufactured using a proprietary high-performance FR-4 multi-purpose epoxy resin system.

This system has a glass transition temperature of 180 degrees Celsius.

It is ideal for multilayer PCB applications.

The Isola PCB material ensures excellent CAF performance, ease of processing, and thermal reliability.

Moreover, it has validated functioning on sequential lamination designs.

Mehrschichtige Leiterplatte

Multilayer PCB Material

What are the Key Features of Isola 370HR?

Here are the main properties of Isola 370HR:

  • Core material comes in full size panel or sheet form
  • Compatible with FR-4 process and lead-free assembly
  • Standard thickness of core material is 0.05 mm (0.002″) to 3.2 mm (0.125”)
  • RoHS-konform
  • Prepreg ist in Platten- oder Rollenform erhältlich
  • CAF Resistant

Which are the Types of Copper Foil Used in Isola 370HR?

Isolierte Leiterplatte

Isolierte Leiterplatte

· HTE Grade 3

High Elongation Electrodeposited copper is IPC-4562 Grade 3 copper foil that has high purity.

The foil exterior face is semi-matt.

It has  “antitarnish treatment to minimize corrosion and oxidation during storage.

Additionally, the matt side receives Zn/Cr treatment to maximize adhesion to prepreg.

· Reverse Treat Foil (RTF)

RTF copper foil entails further treatment of the polished face of electrodeposited copper.

The treatment film is a fine, rough coating that enhances the base foil adhesion to the dielectric of Isola 370HR.

Traditional RTF features the Roughness Surface Area Ratio (RSAR) of 1.0 to 1.2.

Besides they have Rz of 8-10 and Ra of 0.7 to 0.8 on a single or either faces of the foil.

This type of copper foil is smoother and has similar cost as Electrodeposited copper.

Nevertheless, it displays dismal peel strength and is susceptible to delamination making a compromise between performance and cost.

Which are the Advantages of Isola 370HR?

The main benefits of Isola 370HR PCB material include:

  • The laminates and prepregs offer excellent thermal performance with reduced Coefficient of Thermal expansion (CTE).
  • The moisture, mechanical and chemical resistance attributes of Isola 370HR equal or surpass the performance of standard FR-4 materials.
  • Isola 370HR is as well UV blocking and laser fluorescing.

This makes it compatible with optical positioning systems, Automatic Optical Inspection (AOI) systems, and photoimagable solder mask imaging.

  • Ensures high throughput precision during fabrication and assembly of Isola PCB
  • Superior processing and is compatible with FR-4 processing

What are the Applications of Isola 370HR Laminate?

You can use Isola 370HR PCB materials in the following industries:

  • Unterhaltungselektronik
  • Computing, Storage and Peripherals
  • Luft-und Raumfahrt und Verteidigung
  • Networking & Communication Systems
  • Automobil und Transport
  • Medical, Industrial and Instrumentation

Which is the Type of Glass Fabric used in Isola 370HR?

E-glass fiberglass fabric is a light woven composite material often used in the reinforcement of Isola PCB laminates.

It is electrical grade fabric having low alkali content and exhibits low moisture absorption and outstanding electrical insulation.

This type of fiberglass has superior drapability and is cleaner to handle differently from chop strand fiberglass mat.

Moreover, E-glass is less costly than S-glass fiberglass because of its reduced strength.

Therefore, E-glass fiberglass fabric serves as the industry standard.

It offers an exceptional balance between performance and cost.

How do you Control Skew Due to Fiberglass Weave of Isola 370HR?

Isolierte Leiterplatte

Isolierte Leiterplatte

Considering the likely effects of skew on data paths, there exist 5 techniques for managing weave-induced skew.

The methods comprise of:

  • Route the differential pairs in the Isola 370HR laminate at an angle to glass weave.
  • Rotate the artwork at an angle to the weave when fabricating every Isola laminate.
  • Route each pair member using similar pitch as that of glass fibers.
  • You should use a glass having lower dielectric constant similar to the resin system.
  • Apply a glass weave style with the fiberglass mechanically spread in an even manner like 1067, 1078 and 1086.

Are there Quality Certifications for Isola 370HR?

Yes, let’s look at some of the key quality certifications that your Isola 370HR material should have:

  • IPC-Zertifizierung
  • ASTM Certification
  • UL-Zertifizierung
  • IEC Certification
  • ANSI certification
  • ITAR-Zertifizierung
  • REACH-Zertifizierung

What is the recommended Heat Ramp Rate of Isola 370HR?

Insel 370HR features a broad scale of heat ramp rate with a wide flow window.

This allows for multiple lamination approaches that will give good results.

Typically, the heat ramp rate of 370HR ranges from 2.0 to 6.0 degrees Celsius per minute.

The lower range is perfect for low to mid-layer count Isola products.

The rheology of material behaves in a similar way, thus lower heat ramp rates possess higher viscosity compared to high heat ramp rates.

Rates higher than 3 degrees Celsius per minute feature a broader process window without the need for press cycle modification.

Therefore, products needing substantial resin filling (equal to/greater than 2 Oz copper) needs to run >3.5 degrees Celsius per minute.

Platen temperature rise up to 200 degrees Celsius is allowable to satisfy heat ramp requirements if utilizing optional oxides.

Multilayer Isola 370HR

Multi layer Isola 370HR

Why is Square Weave the Best Weave Style for Isola 370HR?

The square weave is the most preferred option for Isola 370HR PCB materials.

The weave features a uniform yarn count in the fill and warp directions.

Furthermore, square weave fiberglass also has a similar pitch in all directions.

Therefore, it makes it very easy to match the glass pitch to the differential pair pitch.

You can do this without over the laminate orientation on the production panel.

How do you Drill Isola 370HR Material?

The 370HR material has greater modulus properties due to the high thermal stability of the applied resin system.

The formation of debris during drilling is different in Isola 370HR compared to FR406-Materialien.



With 370HR, the drill debris stays as free particles and has no effects on the volumes of drill flute relief.

This is because of the increased thermal decomposition attributes of the resin system.

To ensure the effective elimination of resin drill debris, you should employ high helix tools and undercut drill geometries.

Moreover, you require peck drilling parameters for high layer count and thicker general board thicknesses.

When performing secondary drilling of wider hole sizes, you may have to use entry and backer material.

This is instrumental in preventing fracturing /crazing at the perimeter of the hole.

In addition, it may be necessary to use tighter plunge point angle geometries.

Sharper plunge point angle helps you prevent crazing about the perimeters of the secondary drilled hole.

Thick Isola PCBs having heavy copper or unique cladding like invar will need more conservative drill variables.

The process of drilling Isola 370HR has a broad window with outstanding outcomes.

The drill parameters rely on the type of drill bit, design and cure quality.

The speed of the drill tip ranges from 110 to 170 m/min and the chip load spans from 60 to 75 micron per revolution.

Which is the Preferred Method of Desmear for Isola 370HR?

The preferred technique of desmear for Isola 370HR is plasma desmearing.

The method can constantly etch the resin system that is chemically resistant and gives better hole wall texturing if run properly.

Moreover, you can perform plasma desmearing of Isola 370HR with or without one permanganate pass.

However, exercise extreme care to avoid excessive removal of resin if you employ both permanganate and plasma.

Using plasma desmearing method tends to boost general quality of hole, especially in high aspect ratio and/or thick Isola PCBs.

Standard plasma gas blends and cycles are adequate enough.

What is the Sequential Lamination of Isola 370HR?

Sequential lamination entails a variety of technologies in which you laminate an already laminated sub-composite/subparts to extra copper layer.

You can as well perform the lamination to another subpart.

A sequentially-laminated 370HR experiences a minimum of two lamination cycles, although it can pass through many more.

This the main PCB fabrication technique used in High-density Interconnection (HDI) devices.

The technology particularly finds use in Isola 370HR applications involving computer chip packaging, mobile communications, coupled with other uses.

Products manufactured using this technology as usually minute, lightweight and thin.

There exist a wide variety of architecture or types of sequential lamination.

Here are some of the commonly used architectures for sequential lamination of Isola 370HR:

Isola FR406 Material

Isola 370HR PCB

· Standard-HDI

In this architecture, the Isola PCB features a thin center core, normally having 2 to 4 layers.

The core generally features 1 to 3 sequentially applied circuitry layers to every side.

Microvias help in linking the outer layers, while the center core utilizes drilled through vias.

Standard HDI is the most popular approach of sequential lamination of Isola 370HR.

· High Layer Count HDI

Here, the product has a thicker center subpart, typically having 6 to 26 layers.

It also core also has 1 to 2 sequentially applied circuitry layers on every side, with microtia linking them.

The center cores of the Isola 370HR product use drilled plated thru-holes referred to as buried vias.

· Blind via Boards

In this approach, you glue together two subparts, with the subparts positioned on the exterior of the completed PCB.

Both the finished PCB and subparts use drilled plated thru-hole for forming connections.

Moreover, the surface layers may as well have microvias.

Arten von Durchkontaktierungen

Arten von Durchkontaktierungen

Is Isola 370HR Flammable?

High-performance 370HR laminate and prepreg is the best lead-free compatible PCB material.

It guarantees high thermal performance and reliability across a broad range of markets.

The flammability rating of Isola 370HR is UL94 V-0.

UL94 flammability rating establishes whether the PCB material will spread or extinguish a flame after getting ignited.

UL94 V-0 rating implies that the materials stop burning within 10 seconds, with the particles drips being non-inflammable.

What is the Difference Between Peel Strength and Flexural Strength of Isola 370HR?

Hier ist alles, was Sie wissen müssen:

· Schälfestigkeit

Peel strength of Isola laminate determines the strength of the bond between the dielectric material and the copper conductor.

It is denoted in the average load per width of conductor needed for the separation of bonded materials.

The separation angle is always 180 degrees.

You perform the tests on copper samples having 1 OZ thickness and between 32 to 125 mm width.

Moreover, you do the peel strength tests after the standard Isola laminates fabrication process, usually under 3 conditions:

  • After thermal stress: performed after floating the Isola 370HR on solder for 10 seconds at 288 degrees Celsius
  • At raised temperatures: done after exposing the Isola laminate to hot fluid or air at 125 degrees Celsius
  • After process chemicals exposure: carried out after subjecting the sample to a designated sequence of procedures in a thermal or chemical process.

· Flexural Strength

Flexural strength measures the capability of the Isola 370HR material to endure mechanical strain without fracturing.

Its unit of measurement is force per unit area.

Typically, you carry out the test by supporting PCB material at its edges and then putting the weight at the center.

IPC-4101 specifies the minimum flexural strength of a number of base materials used in rigid and multilayer PCBs.

· Young’s Modulus

Furthermore, you can also measure the strength of Isola 370HR material applying tensile modulus or Young’s modulus.

It determines the stress ratio in a specific direction.

Some Isola PCB laminate producers denote the strength of materials with respect to Young’s modulus rather than flexural strength.

Similar to flexural strength, you express it in force per unit area.

Isola 370HR PCB material

 Isola 370HR PCB material

Yes, the 370HR laminate and prepreg system is UV blocking and laser fluorescing.

This allows for imaging by photoimagable solder mask and compatibility with optical positioning and AOI systems.

Which are the Methods for Thermal Analysis of Isola 370HR?

The common thermal analysis techniques for Isola 370HR laminates include:

· Dynamische Differenzkalorimetrie (DSC)

DSC is the most popular method of thermal analysis for establishing the glass transition temperature of Isola laminate material.

It measures the heat flow into and out of a PCB laminate material in comparison to a reference.

The changes in flow of heat helps in identifying the thermodynamic change referred to as glass transition.

It is the temperature range where the amorphous molecules of 370HR resin transform from rigid and fragile to flexible and elastic.

Conventionally, you can consider a Delta Tg below 5 degrees Celsius as a determination of full cure.

Nevertheless, several sources depict that the standard deviation depending on test variation ranges from 1.5 to 2 degrees Celsius.

Because of this fact, you should not over-interpret results of DSC.

· Thermal Mechanical Analysis (TMA)

You can as well employ TMA to measure the glass transition temperature of Isola 370HR.

However, it measures the Tg by determining the expansion of the PCB material.

A drastic change in the expansion rate along the Z-axis accompanies the glass transition temperature.

Majority of thermoset materials, including 370HR exhibit about 500 percent rise in post-Tg rate of expansion compared to pre-Tg expansion rate.

Generally, TMA Tg results are often 5 to 15 degree Celsius below results of DSC.

In addition, actual rates of expansion highly rely on the resin content of the Isola laminate.

· Thermal Gravimetric Analysis (TGA)

TGA in most cases help in measuring the degradation temperature of Isola 370HR material.

The thermal analysis technique determines the alteration in weight against temperature.

Degradation temperature refers to the temperature where a 5 percent loss of weight occurs in the Isola material.

Degradation of a PCB material happens over a broad range of temperature.

It happens due to irreversible breakdown of chemical bonds in the polymer structure.

Isola laminates having higher degradation temperature are more thermally stable, and vice versa.

· Dynamic Mechanical Analysis (DMA)

DMA measures the energy dissipation (damping) and modulus properties of the 370HR laminate as you deform it under a periodic strain.

The measurements give qualitative and quantitative information over the performance of the Isola materials.

The thermal analysis technique is specifically instrumental in analyzing mechanical features of viscoelastic polymeric PCB materials.

Those materials which display temperature, time and frequency effects.

So far, you know that Isola laminates consist of fiberglass fabric impregnated using a thermosetting resin.

Characterization of glass transition temperature of the resin system can at times be challenging by DSC due to high fiber content.

Therefore, DMA is the most suitable method for establishing the Tg of these greatly filled systems.

This is because of the techniques intrinsic responsiveness to the glass transition.

DMA usually provides Tg results 5 to 15 degrees Celsius higher than DSC.

This makes it the best method for characterizing the extent of cure and ultimate mechanical characteristics of filled Isola PCB materials.

In short, before you buy any Isola 370HR material, consider everything in this guide.

At Venture Electronics, we strive to give you high performance and reliable PCB materials.

For all your Isola 370HR material, contact out technical team now.

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