Case Details
- Citation: [2009] SGHC 206
- Title: ASM Assembly Automation Ltd v Aurigin Technology Pte Ltd and Others
- Court: High Court of the Republic of Singapore
- Decision Date: 16 September 2009
- Case Number: Suit 163/2007
- Coram: Tan Lee Meng J
- Plaintiff/Applicant: ASM Assembly Automation Ltd
- Defendants/Respondents: Aurigin Technology Pte Ltd; Lim Ee Teoh; Tam Wing Wah
- Parties (as pleaded): ASM Assembly Automation Ltd — Aurigin Technology Pte Ltd; Lim Ee Teoh; Tam Wing Wah
- Counsel for Plaintiff: Dedar Singh Gill and Paul Teo (Drew & Napier LLC)
- Counsel for Defendants: Low Chai Chong, Lee Ai Ming and Alvin Lim (Rodyk & Davidson LLP)
- Judgment Length: 21 pages, 9,663 words
- Legal Areas: Intellectual Property (Patents); Patent Infringement; Patent Validity; Defences (prior preparation); Groundless Threats
- Statutes Referenced: Patents Act (Cap 221, 2002 Rev Ed) (“the Act”) (including ss 29(1)(c), 29(5), and 71(1))
- Cases Cited: Ng Kok Cheng v Chua Say Tiong [2001] 3 SLR 487; [2009] SGHC 206 (as the present case)
Summary
ASM Assembly Automation Ltd (“ASM”) sued Aurigin Technology Pte Ltd and two of its directors, Lim Ee Teoh (“Mr Lim”) and Tam Wing Wah (“Mr Tam”), alleging infringement of ASM’s Singapore patent relating to an automated apparatus and method for placing solder balls onto substrates used in semiconductor packaging, particularly ball-grid array (“BGA”) substrates. ASM sought declarations of validity and infringement, injunctive relief, and either an inquiry as to damages or an account of profits.
The defendants denied infringement and countered by seeking revocation of ASM’s patent on grounds of lack of novelty and inventiveness. They also pleaded statutory defences under the Patents Act, including the defence in s 71(1) for persons who had made “serious and effective preparations” to manufacture and offer for sale the allegedly infringing product before the relevant priority date. In addition, Aurigin sought an injunction restraining ASM from threatening customers with infringement proceedings, and counterclaimed for groundless threats.
Although the provided extract is truncated, the judgment’s structure and the issues identified show that the High Court’s analysis turned on (i) the proper construction of the patent claims (as amended), (ii) whether the AU800 solder ball placement module fell within the scope of the asserted claims, (iii) the validity challenges (novelty and inventiveness), and (iv) the availability and effect of the s 71(1) prior-preparation defence, including the temporal limits on damages or profits. The court also addressed evidential questions about expert testimony, including the relevance of a patent attorney’s evidence to the “person skilled in the art” inquiry.
What Were the Facts of This Case?
ASM is a Hong Kong company manufacturing and selling semiconductor assembly and packaging equipment. It is the registered proprietor of Singapore Patent No 104354 (“the patent”), granted on 30 December 2005. The patent’s priority date is 8 January 2002. The invention concerns an apparatus and method for automatically placing an array of solder balls onto a substrate, such as a BGA substrate.
ASM’s patent was granted under s 29(1)(c) and s 29(5) of the Patents Act, relying on a corresponding US patent application (US Patent No 6,766,938B2). This reliance is relevant because it frames the patent’s prosecution history and may influence how novelty and inventiveness are assessed, particularly where the Singapore grant is tied to foreign examination outcomes.
Aurigin Technology Pte Ltd (“Aurigin”) is a Singapore company whose flagship product is the AU800 automated BGA solder ball placement machine. The AU800 was invented by Mr Lim and Mr Tam, together with Mr Ng Boon Chew. The AU800 houses a key solder ball placement module based on its own patented module design. Aurigin’s module was patented in Singapore (Patent No 111523) on 30 April 2007, with a priority date of 14 October 2002, and in the United States (Patent No 10/531,611) on 2 December 2008. Importantly, the first two sets of the AU800 were sold by Aurigin on 19 November 2003—well after the priority date of ASM’s patent but relevant to the defendants’ pleaded defences and the timing of preparations and sales.
ASM alleged that Aurigin infringed its Singapore patent and that Mr Lim and Mr Tam, as directors, directed, authorised, counselled, or procured Aurigin to infringe. ASM sought a declaration that its patent is valid and that the defendants’ AU800 infringed specified claims of its amended patent (claims 1–4, 6–7, and 11–12). ASM also sought an injunction and either an inquiry as to damages or an account of profits.
What Were the Key Legal Issues?
The first set of issues concerned infringement and claim scope. The court had to determine the proper construction of ASM’s asserted claims, as amended during the trial, and then compare those claims to the AU800’s solder ball placement module. In patent infringement disputes, the central question is whether the allegedly infringing product falls within the “essential features” of the claim as construed, rather than whether it is merely similar in a general sense.
The second set of issues concerned validity. Aurigin sought revocation of ASM’s patent for lack of novelty and inventiveness. These grounds require the court to assess whether the claimed invention was already disclosed in the prior art (novelty) and whether it would have been obvious to the person skilled in the art at the priority date (inventiveness). The judgment’s discussion of BGA technology and expert evidence indicates that the court would have been required to identify the relevant technical field and the relevant prior art disclosures.
The third set of issues concerned statutory defences and remedies. The defendants pleaded that even if ASM’s patent is valid, they were entitled to rely on s 71(1) of the Patents Act. This defence concerns persons who made “serious and effective preparations” to manufacture and offer to sell the relevant product before the priority date of the patent. The court also had to consider the defendants’ argument that ASM was not entitled to damages or an account of profits prior to 6 December 2006, reflecting the temporal effect of the s 71(1) defence.
Finally, there were issues relating to groundless threats. Aurigin sought an injunction restraining ASM from threatening customers with legal proceedings for infringement. Aurigin also counterclaimed for damages suffered due to ASM’s threats. These issues require careful attention to whether threats were “groundless” within the meaning of the Patents Act framework and whether ASM’s conduct was justified by a reasonable basis.
How Did the Court Analyse the Issues?
The judgment begins by setting out the parties’ positions and the technical context. Because the patent relates to BGA technology, the court considered a technical primer on BGA devices and the problems created by the downsizing of solder balls. The court accepted that as solder balls became smaller, issues such as flux contamination, debris, machining variations, oxidation, and damage became more significant. The technical background matters because it informs what the “person skilled in the art” would understand and what solutions were known at the priority date.
The court then addressed the evidence. ASM called Assoc Prof Khong Poh Wah, an academic expert from NTU, and also called Mr Robert Faber, a patent lawyer and partner at an American intellectual property firm that prosecuted ASM’s US patent. However, Mr Faber admitted that he was not a person skilled in the art. The court relied on the principle from Ng Kok Cheng v Chua Say Tiong [2001] 3 SLR 487, where a patent attorney called as an expert was held not to be an expert for issues requiring the perspective of the person skilled in the art. Applying that reasoning, the court treated Mr Faber’s evidence as not relevant to the technical questions that required the viewpoint of the skilled person.
In contrast, Aurigin called two experts: A/P Tay (also from NTU) and Mr Dennis Miller, a former senior director and vice-president of Motorola Inc. Mr Miller’s credentials included multiple patents, including patents relating to BGA technology. The court indicated that Mr Miller’s evidence was “most useful,” suggesting that the court valued evidence grounded in practical technical innovation and the skilled person’s perspective, rather than purely legal or prosecution-focused testimony.
On claim construction, the court set out ASM’s amended claims in detail, particularly claim 1, which describes an apparatus for positioning solder balls in a desired array on a substrate. Claim 1 includes a positioning member, a movable container for solder balls, and a tilting mechanism that applies force to the solder balls in the direction of movement of the container. The claim further specifies that the tilting mechanism rotates the container about an axis perpendicular to the direction of motion to tilt it. Dependent claims add further features such as repeated rotation/spreading, controllable rotational angles and speeds, a positioning rail and motor, vibration generation, a ball template with apertures slightly larger than solder balls, pick-and-place removal while retaining positions, simultaneous rotation of container/template/substrate, through-holes, a separator cap movable between positions, and a closed container top to reduce oxidation.
Although the extract does not include the later infringement and validity analysis, the court’s approach can be inferred from the issues framed and the detailed claim recitation. The court would have compared each asserted claim’s essential technical features to the AU800’s structure and operation. This would include determining whether the AU800’s solder ball placement module used a container that moves between remote and over-positioning positions, whether it includes a tilting mechanism that rotates about an axis perpendicular to the direction of motion, and whether the AU800’s template/aperture design and separator/cap features correspond to the claim limitations.
For validity, the court would have assessed novelty and inventiveness by identifying relevant prior art in BGA solder ball placement and evaluating whether ASM’s claimed combination of features was already disclosed or would have been obvious. The technical primer and the emphasis on known solutions—such as separating major elements into independent processes and using flux plates—suggest that the court would have considered whether ASM’s claimed tilting/force application and template/aperture arrangements were new and non-obvious over existing BGA placement approaches.
For the s 71(1) defence, the court would have examined the timing and nature of Aurigin’s preparations to manufacture and offer the AU800 for sale. The defendants’ pleaded position that ASM was not entitled to damages or profits prior to 6 December 2006 indicates that the court likely had to determine the date from which the defence no longer shielded Aurigin, or the date from which infringement-related relief could properly be quantified. This defence is particularly important because it can preserve a defendant’s ability to continue activities that were already seriously and effectively prepared before the patent’s priority date, while limiting monetary remedies to the period after the defence ceases to apply.
Finally, on groundless threats, the court would have considered whether ASM’s threats were made without reasonable basis, taking into account the strength of its infringement case and the status of validity. The fact that the court addressed expert relevance (including the exclusion of patent attorney evidence on technical issues) also suggests that the court was careful to ensure that infringement and validity assessments were grounded in proper technical evidence, which in turn affects whether threats were “groundless.”
What Was the Outcome?
The extract provided does not include the court’s final orders. However, the judgment’s framing indicates that the court had to decide multiple relief components: declarations on validity and infringement, injunctive relief, damages or account of profits (subject to the s 71(1) temporal limitation), and the defendants’ counterclaim for groundless threats, including whether to restrain ASM from threatening customers.
Practically, the outcome would have turned on the court’s findings on (i) whether the AU800 infringed ASM’s asserted claims, (ii) whether ASM’s patent was valid against novelty and inventiveness challenges, and (iii) whether Aurigin could rely on s 71(1) to limit monetary remedies. The court’s treatment of expert evidence also signals that the final determination would have depended heavily on technical comparison and the skilled person’s perspective.
Why Does This Case Matter?
This case is significant for Singapore patent litigation because it illustrates how courts approach the intersection of technical claim construction, expert evidence, and statutory defences. The court’s reliance on Ng Kok Cheng v Chua Say Tiong underscores that patent attorney testimony may be limited where the issues require the perspective of the person skilled in the art. For practitioners, this is a reminder that expert selection should be aligned with the technical questions in dispute, not merely with patent prosecution knowledge.
Second, the case highlights the practical importance of s 71(1) of the Patents Act. In industries where products are developed and commercialised over long timelines—such as semiconductor equipment—defendants may have substantial evidence of preparations before a patent’s priority date. The court’s engagement with the defence’s effect on damages and profits demonstrates that even where infringement is found, monetary relief may be constrained by statutory policy protecting those who invested early and seriously.
Third, the groundless threats counterclaim reflects the litigation strategy and commercial realities of patent enforcement. Threats to customers can have immediate business consequences, and the court’s willingness to address an injunction against threats indicates that patent owners must ensure that their enforcement posture is supported by a reasonable technical and legal basis, particularly where validity and infringement are contested.
Legislation Referenced
- Patents Act (Cap 221, 2002 Rev Ed)
- Section 29(1)(c)
- Section 29(5)
- Section 71(1)
Cases Cited
- Ng Kok Cheng v Chua Say Tiong [2001] 3 SLR 487
Source Documents
This article analyses [2009] SGHC 206 for legal research and educational purposes. It does not constitute legal advice. Readers should consult the full judgment for the Court's complete reasoning.