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1 – 10 of over 1000
Article
Publication date: 1 August 1999

Ken Gilleo and Peter Ongley

Reviews the traditional use of thermoset (epoxy) adhesives for various bonding applications and highlights some limitations in today’s microelectronics arena. In particular…

1136

Abstract

Reviews the traditional use of thermoset (epoxy) adhesives for various bonding applications and highlights some limitations in today’s microelectronics arena. In particular, concerns for thermal and stress management associated with large area silicon bonded to a wide variety of substrate materials has led to an increasing interest in thermoplastic adhesive technology. Thermoplastics are not always the best solution for every application. This paper sets out to address the “pros and cons” of each polymer technology for different microelectronic applications taking into account some of the key physical properties such as Tg, TCE and modulus. In addition, practical issues such as handling, storage and processing are considered in detail.

Details

Microelectronics International, vol. 16 no. 2
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 8 February 2011

Thomas Apeldorn, F. Wolff‐Fabris and V. Altstädt

The purpose of this paper is to investigate and present the properties of a new substrate material based on thermoplastic polymers (so‐called LuVo Board) for high‐frequency…

Abstract

Purpose

The purpose of this paper is to investigate and present the properties of a new substrate material based on thermoplastic polymers (so‐called LuVo Board) for high‐frequency applications.

Design/methodology/approach

The thermal, mechanical and electrical properties of a new thermoplastic substrate are investigated and compared to conventional substrates for printed circuit board (PCB) applications.

Findings

The new LuVo Board exhibits similar properties to commercially available high‐performance substrates. The main advantage of the LuVo Board is a reduction of manufacturing costs in comparison to conventional substrates, as a highly automated manufacturing process can be employed. Moreover, the LuVo Board exhibits some further advantages: the material is inherently flame resistant and can be thermally shaped after the assembly process.

Originality/value

This paper presents an entirely new thermoplastic substrate, which can be employed in high‐frequency applications. In comparison to standard materials, a further advantage of the thermoplastic substrate is lower production costs.

Details

Circuit World, vol. 37 no. 1
Type: Research Article
ISSN: 0305-6120

Keywords

Article
Publication date: 1 August 1998

Jaroslav Mackerle

This paper gives a review of the finite element techniques (FE) applied in the area of material processing. The latest trends in metal forming, non‐metal forming, powder…

4528

Abstract

This paper gives a review of the finite element techniques (FE) applied in the area of material processing. The latest trends in metal forming, non‐metal forming, powder metallurgy and composite material processing are briefly discussed. The range of applications of finite elements on these subjects is extremely wide and cannot be presented in a single paper; therefore the aim of the paper is to give FE researchers/users only an encyclopaedic view of the different possibilities that exist today in the various fields mentioned above. An appendix included at the end of the paper presents a bibliography on finite element applications in material processing for 1994‐1996, where 1,370 references are listed. This bibliography is an updating of the paper written by Brannberg and Mackerle which has been published in Engineering Computations, Vol. 11 No. 5, 1994, pp. 413‐55.

Details

Engineering Computations, vol. 15 no. 5
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 1 December 1996

K. Gilleo

The Packaging Revolution of the ’90s, powered by the perpetual drive for smaller‐faster‐cheaper products, is placing increasing demands on the electronic materials sector…

915

Abstract

The Packaging Revolution of the ’90s, powered by the perpetual drive for smaller‐faster‐cheaper products, is placing increasing demands on the electronic materials sector. Down‐sizing, without a cost penalty, requires new materials and processes. Electronic polymers are playing an increasingly vital rôle as area array, chip size components and packageless designs become mainstream technologies. Micro‐Ball Grid Arrays (micro‐BGA), Chip Scale Packages (CSP) and Chip‐on‐Board(COB) require new adhesives and encapsulants that enable the use of low‐cost, high density organic‐based wiring and interconnect structures. Concurrently, new, simplified processes are being developed in order to streamline high volume manufacturing. This paper discusses quick bonding film die attach adhesives, fast‐flow flip‐chip underfills, and a variety of liquid encapsulants as well as new conductive adhesives designed for flip‐chip and micro‐Package assembly. Process innovations include the new Printed Package concept and the appealing simple Polymer Dip Chip method of flip‐chip assembly without paste deposition. The intrinsic versatility and synergy afforded by new and emerging electronic polymers are helping the industry meet the seemingly paradoxical challenge of smaller‐faster‐cheaper.

Details

Microelectronics International, vol. 13 no. 3
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 1 November 1987

Fawzia F. Abdel‐Mohsen and Mohamed A. Radwan

Fire retardant oil‐modified alkyd resin based on chlorendic ahnydride (1,4,5,6,7 7‐hexachlorobicyclo‐(2,2,1) hept‐5‐ene‐2,3‐dicarboxylic anhydride) have been synthesized using…

Abstract

Fire retardant oil‐modified alkyd resin based on chlorendic ahnydride (1,4,5,6,7 7‐hexachlorobicyclo‐(2,2,1) hept‐5‐ene‐2,3‐dicarboxylic anhydride) have been synthesized using linseed oil, phthalic anhydride and glycerol. Several paint formulations were designed to study the effect of pigment/binder ratio, antimony trioxide and chlorinated thermosetting and thermoplastic polymers on fire retardancy. Oxygen index method was used to evaluate the fire retardancy of paints. The chlorinated alkyd resin was used as a plasticizer for laroflex MP 35 to improve the fire retardancy of the thermoplastic chlorinated polymer.

Details

Pigment & Resin Technology, vol. 16 no. 11
Type: Research Article
ISSN: 0369-9420

Article
Publication date: 22 March 2023

Arun Kumar, Pulak Mohan Pandey, Sunil Jha and Shib Shankar Banerjee

This paper aims to discuss the successful 3D printing of styrene–ethylene–butylene–styrene (SEBS) block copolymers using solvent-cast 3D printing (SC-3DP) technique.

Abstract

Purpose

This paper aims to discuss the successful 3D printing of styrene–ethylene–butylene–styrene (SEBS) block copolymers using solvent-cast 3D printing (SC-3DP) technique.

Design/methodology/approach

Three different Kraton grade SEBS block copolymers were used to prepare viscous polymer solutions (ink) in three different solvents, namely, toluene, cyclopentane and tetrahydrofuran. Hansen solubility parameters (HSPs) were taken into account to understand the solvent–polymer interactions. Ultraviolet–visible spectroscopy was used to analyze transmittance behavior of different inks. Printability of ink samples was compared in terms of shape retention capability, solvent evaporation and shear viscosity. Dimensional deviations in 3D-printed parts were evaluated in terms of percentage shrinkage. Surface morphology of 3D-printed parts was investigated by scanning electron microscope. In addition, mechanical properties and rheology of the SC-3D-printed SEBS samples were also investigated.

Findings

HSP analysis revealed toluene to be the most suitable solvent for SC-3DP. Cyclopentane showed a strong preferential solubility toward the ethylene–butylene block. Microscopic surface cracks were present on tetrahydrofuran ink-based 3D-printed samples. SC-3D-printed samples exhibited high elongation at break (up to 2,200%) and low tension set (up to 9%).

Practical implications

SC-3DP proves to be an effective fabrication route for complex SEBS parts overcoming the challenges associated with fused deposition modeling.

Originality/value

To the best of authors’ knowledge, this is the first report investigating the effect of different solvents on physicomechanical properties of SC-3D-printed SEBS block copolymer samples.

Details

Rapid Prototyping Journal, vol. 29 no. 7
Type: Research Article
ISSN: 1355-2546

Keywords

Article
Publication date: 8 May 2018

Nikolai K. Myshkin and Alexander Kovalev

The purpose of this paper is to review the advances in mechanics and tribology of polymers and polymer-based materials. It is focused on the understanding of the correlation of…

Abstract

Purpose

The purpose of this paper is to review the advances in mechanics and tribology of polymers and polymer-based materials. It is focused on the understanding of the correlation of contact mechanics and the tribological behavior of polymers and polymer composites by taking account of surface forces and adhesion in the contact.

Design/methodology/approach

Mechanical behavior of polymers is considered a viscoelasticity. Tribological performance is estimated while considering the parts of deformation and adhesion in friction arising in the contact. Surface energy, roughness, load and temperature effects on the tribological behavior of polymers are evaluated. Polymer composites produced by reinforcing and by the addition of functional additives are considered as materials for various applications in tribology. Particular attention is given to polymer-based nanocomposites.

Findings

A review of studies in tribology has shown that polymer-based materials can be most successfully used as self-lubricating components of sliding bearings. The use of the fillers provides changes in the tribological performance of neat polymers and widens their areas of application in the industry. Thin polymer films were found to be prospective lubricants for memory storage devices, micro-electro-mechanical systems and precision mechanisms. Further progress in polymer tribology should be achieved on solving the problems of contact mechanics, surface physics and tribochemistry by taking account of the scale factor.

Originality/value

The review is based on the experience of the authors in polymer mechanics and tribology, their research data and on data of many other literature sources published in this area. It can be useful for specialists in polymer research and industrial engineers working in tribology and industrial lubrication.

Details

Industrial Lubrication and Tribology, vol. 70 no. 4
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 1 June 1998

Michel Decodts

Corrosion protection has long relied on a number of wet or dry processes including PVC, polyurethane, thermosetting polymer and thermoplastic coatings. Each of these have…

303

Abstract

Corrosion protection has long relied on a number of wet or dry processes including PVC, polyurethane, thermosetting polymer and thermoplastic coatings. Each of these have weaknesses, either in the level of protection provided, durability, cost, or ease of application. The introduction of DuPont’s Abcite ethylene acid copolymer coating represents a major technology breakthrough as it offers a combination of properties with many advantages for a very wide range of applications.

Details

Pigment & Resin Technology, vol. 27 no. 3
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 5 May 2022

Omar Alageel

Three-dimensional (3D) printing technologies have gained attention in dentistry because of their ability to print objects with complex geometries with high precision and accuracy…

Abstract

Purpose

Three-dimensional (3D) printing technologies have gained attention in dentistry because of their ability to print objects with complex geometries with high precision and accuracy, as well as the benefits of saving materials and treatment time. This study aims to explain the principles of the main 3D printing technologies used for manufacturing dental prostheses and devices, with details of their manufacturing processes and characteristics. This review presents an overview of available 3D printing technologies and materials for dental prostheses and devices.

Design/methodology/approach

This review was targeted to include publications pertaining to the fabrication of dental prostheses and devices by 3D printing technologies between 2012 and 2021. A literature search was carried out using the Web of Science, PubMed, Google Scholar search engines, as well as the use of a manual search.

Findings

3D printing technologies have been used for manufacturing dental prostheses and devices using a wide range of materials, including polymers, metals and ceramics. 3D printing technologies have demonstrated promising experimental outcomes for the fabrication of dental prostheses and devices. However, further developments in the materials for fixed dental prostheses are required.

Originality/value

3D printing technologies are effective and commercially available for the manufacturing of polymeric and metallic dental prostheses. Although the printing of dental ceramics and composites for dental prostheses is promising, further improvements are required.

Details

Rapid Prototyping Journal, vol. 28 no. 9
Type: Research Article
ISSN: 1355-2546

Keywords

Article
Publication date: 1 October 1974

Matthew R. Yunaska and Andrew Mercurio

A review of water‐based thermosetting resins for industrial finishes includes the fundamental parameters of acrylic polymers and a comparison of emulsion, colloid and solution…

Abstract

A review of water‐based thermosetting resins for industrial finishes includes the fundamental parameters of acrylic polymers and a comparison of emulsion, colloid and solution properties.

Details

Pigment & Resin Technology, vol. 3 no. 10
Type: Research Article
ISSN: 0369-9420

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